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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT05368077
Other study ID # IRB#21-000408
Secondary ID
Status Recruiting
Phase N/A
First received
Last updated
Start date May 14, 2022
Est. completion date July 31, 2024

Study information

Verified date July 2023
Source University of California, Los Angeles
Contact Rajesh Kumar, PhD
Phone 310-206-1679
Email rkumar@mednet.ucla
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Obstructive sleep apnea (OSA) is highly prevalent in children and is often caused by overgrowth of the child's adenoids and/or tonsils. Consequently, adenotonsillectomy (removal of the tonsils and adenoids) is the most common treatment of OSA in children, although just the tonsils or adenoids may be removed depending on the case. As well, OSA in children is often associated with cognitive dysfunction and mood issues, suggesting brain changes due to the condition. However, the link between brain changes, cognitive and moods issues, and OSA in children has not been thoroughly explored. Therefore, this study aims to examine brain changes, cognition and mood in pediatric OSA subjects compared to controls as well as before and after removal of the adenoids and/or tonsils. This study hopes to enroll 70 subjects, ages 7-12 years, 35 healthy controls and 35 subjects diagnosed with OSA and scheduled for an adenoidectomy and/or tonsillectomy. Control subjects will schedule one visit to UCLA and OSA subjects will schedule two. Upon the first visit, all subjects will undergo cognitive, mood and sleep questionnaires and MRI scanning. That will be the duration of the controls' participation in the study; however, OSA subjects will return 6 months later (after their adenoidectomy and/ or tonsillectomy) to repeat the same procedures. Sleep quality, mood, cognition and brain images will be compared between OSA and controls and between OSA subjects before surgery and after surgery.


Description:

Pediatric obstructive sleep apnea (OSA) is a common and progressive syndrome accompanied by severe cognition, mood, and daytime behavioral issues, as well as poor school performance, presumably stemming from compromised neural tissue, induced by intermittent hypoxia and perfusion changes. However, it is unclear whether the brain tissue injury is in acute or chronic condition, and whether myelin is preferentially affected than axons, an essential step to understand, since interventions for neural repair/recovery differ for acute vs chronic and myelin vs axonal injury. Also, it is unclear whether accompanying brain changes in pediatric OSA have functional consequences, resulting to cognitive or mood deficits. In addition, intermittent hypoxia triggers a cascade of injurious processes affecting endothelial cells, but unclear whether regional cerebral blood flow (CBF) is reduced in pediatric OSA. Treatment methods for pediatric OSA include tonsillectomy and/or adenoidectomy, and it is unclear whether brain tissue changes, regional CBF, and neural responses to cognitive challenge improve post-treatment. Using diffusion tensor imaging (DTI) and diffusion kurtosis imaging (DKI)-based procedures, acute and chronic tissue changes and axonal status and myelin integrity can be assessed. Regional brain CBF can be assessed by validated arterial spin labeling (ASL) imaging, and regional neural activity to cognitive challenge can be examined with blood-oxygen-level-dependent (BOLD) functional magnetic resonance imaging (MRI). Thus, using 35 treatment-naïve, pediatric OSA and 35 control children, the specific aims are to; determine the nature and types of brain tissue injury, using DTI and DKI measures, in untreated pediatric OSA over healthy controls; identify regional brain CBF, using ASL imaging, and neural responses to cognitive challenge, using BOLD functional MRI in pediatric OSA over healthy children; assess cognitive (by the differential ability scale II and NEPSY II) and emotion functions (by the child behavior checklist) in pediatric OSA compared to control children, and examine relationships between brain injury and cognitive and emotion dysfunctions in pediatric OSA; and examine whether brain tissue changes, reduced CBF, and altered neural responses to cognitive challenge reverse, and cognition and mood signs improve after adenotonsillectomy at 6 months in pediatric OSA. In summary, the nature and types of brain injury, regional CBF changes, and neural responses to cognitive challenge, and whether brain tissue changes, altered CBF, and diminished neural responses, as well as mood and cognitive functions recover after adenotonsillectomy in pediatric OSA will be examined. Evaluation of pathological characteristics is essential to assess the mechanisms of damage, and to suggest intervention strategies before and after surgery. The findings will also help guide potential treatments to rescue/restore brain tissue (e.g., nonsteroidal anti-inflammatory drugs) and improve CBF that could be implemented to benefit cognitive and mood health, and improve academic performance in pediatric OSA.


Recruitment information / eligibility

Status Recruiting
Enrollment 70
Est. completion date July 31, 2024
Est. primary completion date April 30, 2024
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 7 Years to 12 Years
Eligibility Inclusion Criteria: OSA - Pediatric OSA subjects will be in the age range 7-12 years (upper and lower age limit will be chosen to avoid developmental-related brain changes and potential requirement of anesthesia for brain MRI) - Have a diagnosis of at least moderate OSA (AHI>5 events/hour) via overnight polysomnography at a sleep laboratory - Without obesity (=95th percentile BMI for age and sex) to avoid perioperative issues - No treatment for the breathing condition - Undergoing for adenotonsillectomy. Control subjects - Healthy children - Age-range from 7-12 years (within ±3 months) - Sex- and BMI-matched (±2 kg/m2) to pediatric OSA - No medications for brain disorders - Without any diagnosed neurological condition Exclusion Criteria: - Previous history of diagnosed psychiatric diseases (depression and other brain disorders that may introduce brain injury) - Cystic fibrosis, concussion, and presence of space-occupying brain lesions - Metallic or electronic implants and other MRI-specific exclusion criteria

Study Design


Related Conditions & MeSH terms


Intervention

Procedure:
Adenotonsillectomy
Adenotonsillectomy is a standard surgical procedure for pediatric OSA treatment, which involves removal of hypertrophied tonsils and adenoids.

Locations

Country Name City State
United States UCLA Los Angeles California

Sponsors (1)

Lead Sponsor Collaborator
University of California, Los Angeles

Country where clinical trial is conducted

United States, 

References & Publications (160)

Achenbach TM, R.L. Manual for the ASEBA school-based forms and profiles. Burlington: University of Vermont, Research Center for Children , Youth and Families, 2001.

Achenbach TM, Ruffle TM. The Child Behavior Checklist and related forms for assessing behavioral/emotional problems and competencies. Pediatr Rev. 2000 Aug;21(8):265-71. doi: 10.1542/pir.21-8-265. No abstract available. — View Citation

Achenbach, T.M. The child behavior checklist and related instruments. In: The use of psychological testing for treatment planning and outcomes assessment, 2nd ed, edited by. Mahwah, NJ, US: Lawrence Erlbaum Associates Publishers, 1999, p. 429-466.

Ahlhelm F, Schneider G, Backens M, Reith W, Hagen T. Time course of the apparent diffusion coefficient after cerebral infarction. Eur Radiol. 2002 Sep;12(9):2322-9. doi: 10.1007/s00330-001-1291-0. Epub 2002 Mar 19. — View Citation

American Society of Anesthesiologists Task Force on Perioperative Management of patients with obstructive sleep apnea. Practice guidelines for the perioperative management of patients with obstructive sleep apnea: an updated report by the American Society of Anesthesiologists Task Force on Perioperative Management of patients with obstructive sleep apnea. Anesthesiology. 2014 Feb;120(2):268-86. doi: 10.1097/ALN.0000000000000053. No abstract available. — View Citation

Ashburner J, Friston KJ. Unified segmentation. Neuroimage. 2005 Jul 1;26(3):839-51. doi: 10.1016/j.neuroimage.2005.02.018. Epub 2005 Apr 1. — View Citation

Barlow SE; Expert Committee. Expert committee recommendations regarding the prevention, assessment, and treatment of child and adolescent overweight and obesity: summary report. Pediatrics. 2007 Dec;120 Suppl 4:S164-92. doi: 10.1542/peds.2007-2329C. — View Citation

Barmpoutis A, Vemuri BC. A UNIFIED FRAMEWORK FOR ESTIMATING DIFFUSION TENSORS OF ANY ORDER WITH SYMMETRIC POSITIVE-DEFINITE CONSTRAINTS. Proc IEEE Int Symp Biomed Imaging. 2010 Apr 14:1385-1388. doi: 10.1109/ISBI.2010.5490256. — View Citation

Barmpoutis, A. & Jiachen, Z. Diffusion kurtosis imaging: robust estimation from DW-MRI using homogeneous polynomials. 2011 IEEE International Symposium on Biomedical Imaging: From Nano to Macro, Chicago, IL: 262-265, 2011.

Barone JG, Hanson C, DaJusta DG, Gioia K, England SJ, Schneider D. Nocturnal enuresis and overweight are associated with obstructive sleep apnea. Pediatrics. 2009 Jul;124(1):e53-9. doi: 10.1542/peds.2008-2805. — View Citation

Bass JL, Corwin M, Gozal D, Moore C, Nishida H, Parker S, Schonwald A, Wilker RE, Stehle S, Kinane TB. The effect of chronic or intermittent hypoxia on cognition in childhood: a review of the evidence. Pediatrics. 2004 Sep;114(3):805-16. doi: 10.1542/peds.2004-0227. — View Citation

Basser PJ, Mattiello J, LeBihan D. Estimation of the effective self-diffusion tensor from the NMR spin echo. J Magn Reson B. 1994 Mar;103(3):247-54. doi: 10.1006/jmrb.1994.1037. — View Citation

Basser PJ, Mattiello J, LeBihan D. MR diffusion tensor spectroscopy and imaging. Biophys J. 1994 Jan;66(1):259-67. doi: 10.1016/S0006-3495(94)80775-1. — View Citation

Basser PJ, Pierpaoli C. A simplified method to measure the diffusion tensor from seven MR images. Magn Reson Med. 1998 Jun;39(6):928-34. doi: 10.1002/mrm.1910390610. — View Citation

Basser PJ, Pierpaoli C. Microstructural and physiological features of tissues elucidated by quantitative-diffusion-tensor MRI. J Magn Reson B. 1996 Jun;111(3):209-19. doi: 10.1006/jmrb.1996.0086. — View Citation

Bedard MA, Montplaisir J, Richer F, Rouleau I, Malo J. Obstructive sleep apnea syndrome: pathogenesis of neuropsychological deficits. J Clin Exp Neuropsychol. 1991 Nov;13(6):950-64. doi: 10.1080/01688639108405110. — View Citation

Beebe DW, Ris MD, Kramer ME, Long E, Amin R. The association between sleep disordered breathing, academic grades, and cognitive and behavioral functioning among overweight subjects during middle to late childhood. Sleep. 2010 Nov;33(11):1447-56. doi: 10.1093/sleep/33.11.1447. — View Citation

Bender HA, Marks BC, Brown ER, Zach L, Zaroff CM. Neuropsychologic performance of children with epilepsy on the NEPSY. Pediatr Neurol. 2007 May;36(5):312-7. doi: 10.1016/j.pediatrneurol.2007.01.011. — View Citation

Benveniste H, Drejer J, Schousboe A, Diemer NH. Elevation of the extracellular concentrations of glutamate and aspartate in rat hippocampus during transient cerebral ischemia monitored by intracerebral microdialysis. J Neurochem. 1984 Nov;43(5):1369-74. doi: 10.1111/j.1471-4159.1984.tb05396.x. — View Citation

Bhagat YA, Hussain MS, Stobbe RW, Butcher KS, Emery DJ, Shuaib A, Siddiqui MM, Maheshwari P, Al-Hussain F, Beaulieu C. Elevations of diffusion anisotropy are associated with hyper-acute stroke: a serial imaging study. Magn Reson Imaging. 2008 Jun;26(5):683-93. doi: 10.1016/j.mri.2008.01.015. Epub 2008 Apr 28. — View Citation

Blunden SL, Beebe DW. The contribution of intermittent hypoxia, sleep debt and sleep disruption to daytime performance deficits in children: consideration of respiratory and non-respiratory sleep disorders. Sleep Med Rev. 2006 Apr;10(2):109-18. doi: 10.1016/j.smrv.2005.11.003. Epub 2006 Feb 20. — View Citation

Buckley DL, Bui JD, Phillips MI, Zelles T, Inglis BA, Plant HD, Blackband SJ. The effect of ouabain on water diffusion in the rat hippocampal slice measured by high resolution NMR imaging. Magn Reson Med. 1999 Jan;41(1):137-42. doi: 10.1002/(sici)1522-2594(199901)41:13.0.co;2-y. — View Citation

Canessa N, Castronovo V, Cappa SF, Aloia MS, Marelli S, Falini A, Alemanno F, Ferini-Strambi L. Obstructive sleep apnea: brain structural changes and neurocognitive function before and after treatment. Am J Respir Crit Care Med. 2011 May 15;183(10):1419-26. doi: 10.1164/rccm.201005-0693OC. Epub 2010 Oct 29. — View Citation

Canivez GL, McGill RJ. Factor structure of the Differential Ability Scales-Second Edition: Exploratory and hierarchical factor analyses with the core subtests. Psychol Assess. 2016 Nov;28(11):1475-1488. doi: 10.1037/pas0000279. Epub 2016 Jan 25. — View Citation

Castronovo V, Scifo P, Castellano A, Aloia MS, Iadanza A, Marelli S, Cappa SF, Strambi LF, Falini A. White matter integrity in obstructive sleep apnea before and after treatment. Sleep. 2014 Sep 1;37(9):1465-75. doi: 10.5665/sleep.3994. — View Citation

Cha J, Zea-Hernandez JA, Sin S, Graw-Panzer K, Shifteh K, Isasi CR, Wagshul ME, Moran EE, Posner J, Zimmerman ME, Arens R. The Effects of Obstructive Sleep Apnea Syndrome on the Dentate Gyrus and Learning and Memory in Children. J Neurosci. 2017 Apr 19;37(16):4280-4288. doi: 10.1523/JNEUROSCI.3583-16.2017. Epub 2017 Mar 20. — View Citation

Chan KC, Khong PL, Lau HF, Cheung PT, Wu EX. Late measures of microstructural alterations in severe neonatal hypoxic-ischemic encephalopathy by MR diffusion tensor imaging. Int J Dev Neurosci. 2009 Oct;27(6):607-15. doi: 10.1016/j.ijdevneu.2009.05.012. Epub 2009 Jun 6. — View Citation

Chen HL, Lin HC, Lu CH, Chen PC, Huang CC, Chou KH, Su MC, Friedman M, Chen YW, Lin WC. Systemic inflammation and alterations to cerebral blood flow in obstructive sleep apnea. J Sleep Res. 2017 Dec;26(6):789-798. doi: 10.1111/jsr.12553. Epub 2017 May 17. — View Citation

Chen Y, Wang DJ, Detre JA. Test-retest reliability of arterial spin labeling with common labeling strategies. J Magn Reson Imaging. 2011 Apr;33(4):940-9. doi: 10.1002/jmri.22345. — View Citation

Cheung MM, Hui ES, Chan KC, Helpern JA, Qi L, Wu EX. Does diffusion kurtosis imaging lead to better neural tissue characterization? A rodent brain maturation study. Neuroimage. 2009 Apr 1;45(2):386-92. doi: 10.1016/j.neuroimage.2008.12.018. Epub 2008 Dec 25. — View Citation

Chopra S, Polotsky VY, Jun JC. Sleep Apnea Research in Animals. Past, Present, and Future. Am J Respir Cell Mol Biol. 2016 Mar;54(3):299-305. doi: 10.1165/rcmb.2015-0218TR. — View Citation

Chumbley JR, Friston KJ. False discovery rate revisited: FDR and topological inference using Gaussian random fields. Neuroimage. 2009 Jan 1;44(1):62-70. doi: 10.1016/j.neuroimage.2008.05.021. Epub 2008 May 23. — View Citation

Counsell SJ, Shen Y, Boardman JP, Larkman DJ, Kapellou O, Ward P, Allsop JM, Cowan FM, Hajnal JV, Edwards AD, Rutherford MA. Axial and radial diffusivity in preterm infants who have diffuse white matter changes on magnetic resonance imaging at term-equivalent age. Pediatrics. 2006 Feb;117(2):376-86. doi: 10.1542/peds.2005-0820. — View Citation

Crabtree VM, Varni JW, Gozal D. Health-related quality of life and depressive symptoms in children with suspected sleep-disordered breathing. Sleep. 2004 Sep 15;27(6):1131-8. doi: 10.1093/sleep/27.6.1131. — View Citation

Daniel DG, Weinberger DR, Jones DW, Zigun JR, Coppola R, Handel S, Bigelow LB, Goldberg TE, Berman KF, Kleinman JE. The effect of amphetamine on regional cerebral blood flow during cognitive activation in schizophrenia. J Neurosci. 1991 Jul;11(7):1907-17. doi: 10.1523/JNEUROSCI.11-07-01907.1991. — View Citation

de Bazelaire C, Alsop DC, George D, Pedrosa I, Wang Y, Michaelson MD, Rofsky NM. Magnetic resonance imaging-measured blood flow change after antiangiogenic therapy with PTK787/ZK 222584 correlates with clinical outcome in metastatic renal cell carcinoma. Clin Cancer Res. 2008 Sep 1;14(17):5548-54. doi: 10.1158/1078-0432.CCR-08-0417. — View Citation

Dehlink E, Tan HL. Update on paediatric obstructive sleep apnoea. J Thorac Dis. 2016 Feb;8(2):224-35. doi: 10.3978/j.issn.2072-1439.2015.12.04. — View Citation

Dirnagl U, Iadecola C, Moskowitz MA. Pathobiology of ischaemic stroke: an integrated view. Trends Neurosci. 1999 Sep;22(9):391-7. doi: 10.1016/s0166-2236(99)01401-0. — View Citation

Dormehl IC, Jordaan B, Oliver DW, Croft S. SPECT monitoring of improved cerebral blood flow during long-term treatment of elderly patients with nootropic drugs. Clin Nucl Med. 1999 Jan;24(1):29-34. doi: 10.1097/00003072-199901000-00007. — View Citation

Ehlert, L., Roy, B., Sahib, A., Song, X., Singh, S., Townsley, M., Kang, D.W., Aysola, R., Wen, E., Woo, M.A., Harper, R.M. & Kumar, R. Diffusion tensor imaging shows brain tissue changes before and after positive airway pressure treatment in patients with obstructive sleep apnea. Society for Neuroscience Annual Meeting, Washington, DC, USA, 2017.

Ehlert, L., Roy, B., Sahib, A.K., Song, X., Singh, S., Townsley, M., Kang, D.W., Aysola, R., Wen, E., Woo, M.A., Harper, R.M. & Kumar, R. Diffusion tensor imaging shows brain tissue changes before and after positive airway pressure treatment in patients with obstructive sleep apnea. Society for Neuroscience Annual Meeting, Washington, D.C., 2017.

Elliott, C.D. Differential Ability Scales : introductory and technical handbook. San Antonio: Psychological Corp: Harcourt Brace Jovanovich, 1990.

Ellis, E.M., Zarndt, R., Ho, B., Hopkins, S. & Powell, F.L. Effects of non-steroid anti-inflammatory drugs on the human hypoxic ventilatory response and acclimatization. The FASEB Journal 26: 1150.1152- 1150.1152, 2012.

Engleman H, Joffe D. Neuropsychological function in obstructive sleep apnoea. Sleep Med Rev. 1999 Mar;3(1):59-78. doi: 10.1016/s1087-0792(99)90014-x. — View Citation

Faul F, Erdfelder E, Lang AG, Buchner A. G*Power 3: a flexible statistical power analysis program for the social, behavioral, and biomedical sciences. Behav Res Methods. 2007 May;39(2):175-91. doi: 10.3758/bf03193146. — View Citation

Feng CM, Narayana S, Lancaster JL, Jerabek PA, Arnow TL, Zhu F, Tan LH, Fox PT, Gao JH. CBF changes during brain activation: fMRI vs. PET. Neuroimage. 2004 May;22(1):443-6. doi: 10.1016/j.neuroimage.2004.01.017. — View Citation

Fieremans E, Jensen JH, Helpern JA. White matter characterization with diffusional kurtosis imaging. Neuroimage. 2011 Sep 1;58(1):177-88. doi: 10.1016/j.neuroimage.2011.06.006. Epub 2011 Jun 13. — View Citation

Floyd TF, Ratcliffe SJ, Wang J, Resch B, Detre JA. Precision of the CASL-perfusion MRI technique for the measurement of cerebral blood flow in whole brain and vascular territories. J Magn Reson Imaging. 2003 Dec;18(6):649-55. doi: 10.1002/jmri.10416. — View Citation

Friedman BC, Hendeles-Amitai A, Kozminsky E, Leiberman A, Friger M, Tarasiuk A, Tal A. Adenotonsillectomy improves neurocognitive function in children with obstructive sleep apnea syndrome. Sleep. 2003 Dec 15;26(8):999-1005. doi: 10.1093/sleep/26.8.999. — View Citation

Goldstein NA, Post JC, Rosenfeld RM, Campbell TF. Impact of tonsillectomy and adenoidectomy on child behavior. Arch Otolaryngol Head Neck Surg. 2000 Apr;126(4):494-8. doi: 10.1001/archotol.126.4.494. — View Citation

Goodwin JL, Vasquez MM, Silva GE, Quan SF. Incidence and remission of sleep-disordered breathing and related symptoms in 6- to 17-year old children--the Tucson Children's Assessment of Sleep Apnea Study. J Pediatr. 2010 Jul;157(1):57-61. doi: 10.1016/j.jpeds.2010.01.033. Epub 2010 Mar 20. — View Citation

Goswami AR, Dutta G, Ghosh T. Naproxen, a Nonsteroidal Anti-Inflammatory Drug, Can Affect Daily Hypobaric Hypoxia-Induced Alterations of Monoamine Levels in Different Areas of the Brain in Male Rats. High Alt Med Biol. 2016 Jun;17(2):133-40. doi: 10.1089/ham.2015.0052. Epub 2016 Feb 19. — View Citation

Gozal D, Daniel JM, Dohanich GP. Behavioral and anatomical correlates of chronic episodic hypoxia during sleep in the rat. J Neurosci. 2001 Apr 1;21(7):2442-50. doi: 10.1523/JNEUROSCI.21-07-02442.2001. — View Citation

Gozal D, Row BW, Gozal E, Kheirandish L, Neville JJ, Brittian KR, Sachleben LR Jr, Guo SZ. Temporal aspects of spatial task performance during intermittent hypoxia in the rat: evidence for neurogenesis. Eur J Neurosci. 2003 Oct;18(8):2335-42. doi: 10.1046/j.1460-9568.2003.02947.x. — View Citation

Gozal D, Wang M, Pope DW Jr. Objective sleepiness measures in pediatric obstructive sleep apnea. Pediatrics. 2001 Sep;108(3):693-7. doi: 10.1542/peds.108.3.693. — View Citation

Gozal D. Sleep-disordered breathing and school performance in children. Pediatrics. 1998 Sep;102(3 Pt 1):616-20. doi: 10.1542/peds.102.3.616. — View Citation

Gozal E, Row BW, Schurr A, Gozal D. Developmental differences in cortical and hippocampal vulnerability to intermittent hypoxia in the rat. Neurosci Lett. 2001 Jun 15;305(3):197-201. doi: 10.1016/s0304-3940(01)01853-5. — View Citation

Hagberg H, Lehmann A, Sandberg M, Nystrom B, Jacobson I, Hamberger A. Ischemia-induced shift of inhibitory and excitatory amino acids from intra- to extracellular compartments. J Cereb Blood Flow Metab. 1985 Sep;5(3):413-9. doi: 10.1038/jcbfm.1985.56. — View Citation

Halbower AC, Degaonkar M, Barker PB, Earley CJ, Marcus CL, Smith PL, Prahme MC, Mahone EM. Childhood obstructive sleep apnea associates with neuropsychological deficits and neuronal brain injury. PLoS Med. 2006 Aug;3(8):e301. doi: 10.1371/journal.pmed.0030301. — View Citation

Horne RSC, Roy B, Walter LM, Biggs SN, Tamanyan K, Weichard A, Nixon GM, Davey MJ, Ditchfield M, Harper RM, Kumar R. Regional brain tissue changes and associations with disease severity in children with sleep-disordered breathing. Sleep. 2018 Feb 1;41(2):zsx203. doi: 10.1093/sleep/zsx203. — View Citation

Hossmann KA, Fischer M, Bockhorst K, Hoehn-Berlage M. NMR imaging of the apparent diffusion coefficient (ADC) for the evaluation of metabolic suppression and recovery after prolonged cerebral ischemia. J Cereb Blood Flow Metab. 1994 Sep;14(5):723-31. doi: 10.1038/jcbfm.1994.93. — View Citation

Hossmann KA. Cortical steady potential, impedance and excitability changes during and after total ischemia of cat brain. Exp Neurol. 1971 Aug;32(2):163-75. doi: 10.1016/0014-4886(71)90060-4. No abstract available. — View Citation

Hu WT, Wang Z, Lee VM, Trojanowski JQ, Detre JA, Grossman M. Distinct cerebral perfusion patterns in FTLD and AD. Neurology. 2010 Sep 7;75(10):881-8. doi: 10.1212/WNL.0b013e3181f11e35. — View Citation

Huang YS, Guilleminault C, Lee LA, Lin CH, Hwang FM. Treatment outcomes of adenotonsillectomy for children with obstructive sleep apnea: a prospective longitudinal study. Sleep. 2014 Jan 1;37(1):71-6. doi: 10.5665/sleep.3310. — View Citation

Hui ES, Cheung MM, Qi L, Wu EX. Towards better MR characterization of neural tissues using directional diffusion kurtosis analysis. Neuroimage. 2008 Aug 1;42(1):122-34. doi: 10.1016/j.neuroimage.2008.04.237. Epub 2008 Apr 30. — View Citation

Ishiguro H, Kawahara T. Nonsteroidal anti-inflammatory drugs and prostatic diseases. Biomed Res Int. 2014;2014:436123. doi: 10.1155/2014/436123. Epub 2014 May 12. — View Citation

Jensen JH, Falangola MF, Hu C, Tabesh A, Rapalino O, Lo C, Helpern JA. Preliminary observations of increased diffusional kurtosis in human brain following recent cerebral infarction. NMR Biomed. 2011 Jun;24(5):452-7. doi: 10.1002/nbm.1610. Epub 2010 Oct 19. — View Citation

Jensen JH, Helpern JA, Ramani A, Lu H, Kaczynski K. Diffusional kurtosis imaging: the quantification of non-gaussian water diffusion by means of magnetic resonance imaging. Magn Reson Med. 2005 Jun;53(6):1432-40. doi: 10.1002/mrm.20508. — View Citation

Joo EY, Tae WS, Han SJ, Cho JW, Hong SB. Reduced cerebral blood flow during wakefulness in obstructive sleep apnea-hypopnea syndrome. Sleep. 2007 Nov;30(11):1515-20. doi: 10.1093/sleep/30.11.1515. — View Citation

Kassmann CM, Nave KA. Oligodendroglial impact on axonal function and survival - a hypothesis. Curr Opin Neurol. 2008 Jun;21(3):235-41. doi: 10.1097/WCO.0b013e328300c71f. — View Citation

Keith, T.Z., Low, J.A., Reynolds, M.R., Patel, P.G. & Ridley, K.P. Higher-order factor structure of the differential ability scales-II: consistency across ages 4 to 17. Psychology in the Schools 47: 676-697, 2010.

Kelly PJ, Hedley-Whyte ET, Primavera J, He J, Gonzalez RG. Diffusion MRI in ischemic stroke compared to pathologically verified infarction. Neurology. 2001 Apr 10;56(7):914-20. doi: 10.1212/wnl.56.7.914. — View Citation

Kheirandish L, Gozal D. Neurocognitive dysfunction in children with sleep disorders. Dev Sci. 2006 Jul;9(4):388-99. doi: 10.1111/j.1467-7687.2006.00504.x. — View Citation

Kheirandish-Gozal L, De Jong MR, Spruyt K, Chamuleau SA, Gozal D. Obstructive sleep apnoea is associated with impaired pictorial memory task acquisition and retention in children. Eur Respir J. 2010 Jul;36(1):164-9. doi: 10.1183/09031936.00114209. Epub 2010 Jan 14. — View Citation

Kheirandish-Gozal L, Sahib AK, Macey PM, Philby MF, Gozal D, Kumar R. Regional brain tissue integrity in pediatric obstructive sleep apnea. Neurosci Lett. 2018 Aug 24;682:118-123. doi: 10.1016/j.neulet.2018.06.002. Epub 2018 Jun 5. — View Citation

Kheirandish-Gozal L, Yoder K, Kulkarni R, Gozal D, Decety J. Preliminary functional MRI neural correlates of executive functioning and empathy in children with obstructive sleep apnea. Sleep. 2014 Mar 1;37(3):587-92. doi: 10.5665/sleep.3504. — View Citation

Kidwell CS, Alger JR, Di Salle F, Starkman S, Villablanca P, Bentson J, Saver JL. Diffusion MRI in patients with transient ischemic attacks. Stroke. 1999 Jun;30(6):1174-80. doi: 10.1161/01.str.30.6.1174. — View Citation

Kim H, Joo E, Suh S, Kim JH, Kim ST, Hong SB. Effects of long-term treatment on brain volume in patients with obstructive sleep apnea syndrome. Hum Brain Mapp. 2016 Jan;37(1):395-409. doi: 10.1002/hbm.23038. Epub 2015 Oct 27. — View Citation

Kumar R, Chavez AS, Macey PM, Woo MA, Yan-Go FL, Harper RM. Altered global and regional brain mean diffusivity in patients with obstructive sleep apnea. J Neurosci Res. 2012 Oct;90(10):2043-52. doi: 10.1002/jnr.23083. Epub 2012 Jun 20. — View Citation

Kumar R, Delshad S, Macey PM, Woo MA, Harper RM. Development of T2-relaxation values in regional brain sites during adolescence. Magn Reson Imaging. 2011 Feb;29(2):185-93. doi: 10.1016/j.mri.2010.08.006. Epub 2010 Oct 8. — View Citation

Kumar R, Delshad S, Woo MA, Macey PM, Harper RM. Age-related regional brain T2-relaxation changes in healthy adults. J Magn Reson Imaging. 2012 Feb;35(2):300-8. doi: 10.1002/jmri.22831. Epub 2011 Oct 10. — View Citation

Kumar R, Macey PM, Woo MA, Alger JR, Harper RM. Diffusion tensor imaging demonstrates brainstem and cerebellar abnormalities in congenital central hypoventilation syndrome. Pediatr Res. 2008 Sep;64(3):275-80. doi: 10.1203/PDR.0b013e31817da10a. — View Citation

Kumar R, Macey PM, Woo MA, Alger JR, Harper RM. Elevated mean diffusivity in widespread brain regions in congenital central hypoventilation syndrome. J Magn Reson Imaging. 2006 Dec;24(6):1252-8. doi: 10.1002/jmri.20759. — View Citation

Kumar R, Macey PM, Woo MA, Alger JR, Keens TG, Harper RM. Neuroanatomic deficits in congenital central hypoventilation syndrome. J Comp Neurol. 2005 Jul 11;487(4):361-71. doi: 10.1002/cne.20565. — View Citation

Kumar R, Nguyen HD, Macey PM, Woo MA, Harper RM. Dilated basilar arteries in patients with congenital central hypoventilation syndrome. Neurosci Lett. 2009 Dec 25;467(2):139-43. doi: 10.1016/j.neulet.2009.10.024. Epub 2009 Oct 12. — View Citation

Kumar R, Nguyen HD, Macey PM, Woo MA, Harper RM. Regional brain axial and radial diffusivity changes during development. J Neurosci Res. 2012 Feb;90(2):346-55. doi: 10.1002/jnr.22757. Epub 2011 Sep 21. — View Citation

Kumar R, Pham TT, Macey PM, Woo MA, Yan-Go FL, Harper RM. Abnormal myelin and axonal integrity in recently diagnosed patients with obstructive sleep apnea. Sleep. 2014 Apr 1;37(4):723-32. doi: 10.5665/sleep.3578. — View Citation

Lazar M, Jensen JH, Xuan L, Helpern JA. Estimation of the orientation distribution function from diffusional kurtosis imaging. Magn Reson Med. 2008 Oct;60(4):774-81. doi: 10.1002/mrm.21725. — View Citation

Le Bihan D, Mangin JF, Poupon C, Clark CA, Pappata S, Molko N, Chabriat H. Diffusion tensor imaging: concepts and applications. J Magn Reson Imaging. 2001 Apr;13(4):534-46. doi: 10.1002/jmri.1076. — View Citation

Lecouvet FE, Duprez TP, Raymackers JM, Peeters A, Cosnard G. Resolution of early diffusion-weighted and FLAIR MRI abnormalities in a patient with TIA. Neurology. 1999 Mar 23;52(5):1085-7. doi: 10.1212/wnl.52.5.1085. — View Citation

Leviton A, Joseph RM, Allred EN, O'Shea TM, Taylor HG, Kuban KKC. Antenatal and Neonatal Antecedents of Executive Dysfunctions in Extremely Preterm Children. J Child Neurol. 2018 Mar;33(3):198-208. doi: 10.1177/0883073817750499. Epub 2018 Jan 11. — View Citation

Li AM, So HK, Au CT, Ho C, Lau J, Ng SK, Abdullah VJ, Fok TF, Wing YK. Epidemiology of obstructive sleep apnoea syndrome in Chinese children: a two-phase community study. Thorax. 2010 Nov;65(11):991-7. doi: 10.1136/thx.2010.134858. — View Citation

Lind A, Korkman M, Lehtonen L, Lapinleimu H, Parkkola R, Matomaki J, Haataja L; PIPARI Study Group. Cognitive and neuropsychological outcomes at 5 years of age in preterm children born in the 2000s. Dev Med Child Neurol. 2011 Mar;53(3):256-62. doi: 10.1111/j.1469-8749.2010.03828.x. Epub 2010 Dec 17. — View Citation

Lipsitz LA, Gagnon M, Vyas M, Iloputaife I, Kiely DK, Sorond F, Serrador J, Cheng DM, Babikian V, Cupples LA. Antihypertensive therapy increases cerebral blood flow and carotid distensibility in hypertensive elderly subjects. Hypertension. 2005 Feb;45(2):216-21. doi: 10.1161/01.HYP.0000153094.09615.11. Epub 2005 Jan 17. — View Citation

Loubinoux I, Volk A, Borredon J, Guirimand S, Tiffon B, Seylaz J, Meric P. Spreading of vasogenic edema and cytotoxic edema assessed by quantitative diffusion and T2 magnetic resonance imaging. Stroke. 1997 Feb;28(2):419-26; discussion 426-7. doi: 10.1161/01.str.28.2.419. — View Citation

Lowe MJ, Horenstein C, Hirsch JG, Marrie RA, Stone L, Bhattacharyya PK, Gass A, Phillips MD. Functional pathway-defined MRI diffusion measures reveal increased transverse diffusivity of water in multiple sclerosis. Neuroimage. 2006 Sep;32(3):1127-33. doi: 10.1016/j.neuroimage.2006.04.208. Epub 2006 Jun 23. — View Citation

LOWRY OH, PASSONNEAU JV, HASSELBERGER FX, SCHULZ DW. EFFECT OF ISCHEMIA ON KNOWN SUBSTRATES AND COFACTORS OF THE GLYCOLYTIC PATHWAY IN BRAIN. J Biol Chem. 1964 Jan;239:18-30. No abstract available. — View Citation

Lu H, Jensen JH, Ramani A, Helpern JA. Three-dimensional characterization of non-gaussian water diffusion in humans using diffusion kurtosis imaging. NMR Biomed. 2006 Apr;19(2):236-47. doi: 10.1002/nbm.1020. — View Citation

Lumeng JC, Chervin RD. Epidemiology of pediatric obstructive sleep apnea. Proc Am Thorac Soc. 2008 Feb 15;5(2):242-52. doi: 10.1513/pats.200708-135MG. — View Citation

Macey PM, Alger JR, Kumar R, Macey KE, Woo MA, Harper RM. Global BOLD MRI changes to ventilatory challenges in congenital central hypoventilation syndrome. Respir Physiol Neurobiol. 2003 Dec 16;139(1):41-50. doi: 10.1016/j.resp.2003.09.006. — View Citation

Macey PM, Kheirandish-Gozal L, Prasad JP, Ma RA, Kumar R, Philby MF, Gozal D. Altered Regional Brain Cortical Thickness in Pediatric Obstructive Sleep Apnea. Front Neurol. 2018 Jan 22;9:4. doi: 10.3389/fneur.2018.00004. eCollection 2018. — View Citation

Marcus CL, Brooks LJ, Draper KA, Gozal D, Halbower AC, Jones J, Schechter MS, Sheldon SH, Spruyt K, Ward SD, Lehmann C, Shiffman RN; American Academy of Pediatrics. Diagnosis and management of childhood obstructive sleep apnea syndrome. Pediatrics. 2012 Sep;130(3):576-84. doi: 10.1542/peds.2012-1671. Epub 2012 Aug 27. — View Citation

Marcus CL, Moore RH, Rosen CL, Giordani B, Garetz SL, Taylor HG, Mitchell RB, Amin R, Katz ES, Arens R, Paruthi S, Muzumdar H, Gozal D, Thomas NH, Ware J, Beebe D, Snyder K, Elden L, Sprecher RC, Willging P, Jones D, Bent JP, Hoban T, Chervin RD, Ellenberg SS, Redline S; Childhood Adenotonsillectomy Trial (CHAT). A randomized trial of adenotonsillectomy for childhood sleep apnea. N Engl J Med. 2013 Jun 20;368(25):2366-76. doi: 10.1056/NEJMoa1215881. Epub 2013 May 21. — View Citation

Maresky HS, Shpirer I, Klar MM, Levitt M, Sasson E, Tal S. Continuous positive airway pressure alters brain microstructure and perfusion patterns in patients with obstructive sleep apnea. Sleep Med. 2019 May;57:61-69. doi: 10.1016/j.sleep.2018.12.027. Epub 2019 Jan 31. — View Citation

Matsumoto K, Lo EH, Pierce AR, Wei H, Garrido L, Kowall NW. Role of vasogenic edema and tissue cavitation in ischemic evolution on diffusion-weighted imaging: comparison with multiparameter MR and immunohistochemistry. AJNR Am J Neuroradiol. 1995 May;16(5):1107-15. — View Citation

Mintorovitch J, Yang GY, Shimizu H, Kucharczyk J, Chan PH, Weinstein PR. Diffusion-weighted magnetic resonance imaging of acute focal cerebral ischemia: comparison of signal intensity with changes in brain water and Na+,K(+)-ATPase activity. J Cereb Blood Flow Metab. 1994 Mar;14(2):332-6. doi: 10.1038/jcbfm.1994.40. — View Citation

Mori S, Zhang J. Principles of diffusion tensor imaging and its applications to basic neuroscience research. Neuron. 2006 Sep 7;51(5):527-39. doi: 10.1016/j.neuron.2006.08.012. — View Citation

Mulkern RV, Zengingonul HP, Robertson RL, Bogner P, Zou KH, Gudbjartsson H, Guttmann CR, Holtzman D, Kyriakos W, Jolesz FA, Maier SE. Multi-component apparent diffusion coefficients in human brain: relationship to spin-lattice relaxation. Magn Reson Med. 2000 Aug;44(2):292-300. doi: 10.1002/1522-2594(200008)44:23.0.co;2-q. — View Citation

Murata E, Mohri I, Kato-Nishimura K, Iimura J, Ogawa M, Tachibana M, Ohno Y, Taniike M. Evaluation of behavioral change after adenotonsillectomy for obstructive sleep apnea in children with autism spectrum disorder. Res Dev Disabil. 2017 Jun;65:127-139. doi: 10.1016/j.ridd.2017.04.012. Epub 2017 May 14. — View Citation

Nair G, Tanahashi Y, Low HP, Billings-Gagliardi S, Schwartz WJ, Duong TQ. Myelination and long diffusion times alter diffusion-tensor-imaging contrast in myelin-deficient shiverer mice. Neuroimage. 2005 Oct 15;28(1):165-74. doi: 10.1016/j.neuroimage.2005.05.049. Epub 2005 Jul 14. — View Citation

Newcombe VF, Williams GB, Nortje J, Bradley PG, Harding SG, Smielewski P, Coles JP, Maiya B, Gillard JH, Hutchinson PJ, Pickard JD, Carpenter TA, Menon DK. Analysis of acute traumatic axonal injury using diffusion tensor imaging. Br J Neurosurg. 2007 Aug;21(4):340-8. doi: 10.1080/02688690701400882. — View Citation

Nieminen P, Lopponen T, Tolonen U, Lanning P, Knip M, Lopponen H. Growth and biochemical markers of growth in children with snoring and obstructive sleep apnea. Pediatrics. 2002 Apr;109(4):e55. doi: 10.1542/peds.109.4.e55. — View Citation

Nukada H, Dyck PJ. Acute ischemia causes axonal stasis, swelling, attenuation, and secondary demyelination. Ann Neurol. 1987 Sep;22(3):311-8. doi: 10.1002/ana.410220306. — View Citation

O'Brien LM, Mervis CB, Holbrook CR, Bruner JL, Smith NH, McNally N, McClimment MC, Gozal D. Neurobehavioral correlates of sleep-disordered breathing in children. J Sleep Res. 2004 Jun;13(2):165-72. doi: 10.1111/j.1365-2869.2004.00395.x. — View Citation

O'Dell TJ, Huang PL, Dawson TM, Dinerman JL, Snyder SH, Kandel ER, Fishman MC. Endothelial NOS and the blockade of LTP by NOS inhibitors in mice lacking neuronal NOS. Science. 1994 Jul 22;265(5171):542-6. doi: 10.1126/science.7518615. — View Citation

Oehmichen M, Ochs U, Meissner C. Regional potassium distribution in the brain in forensic relevant types of intoxication preliminary morphometric evaluation using a histochemical method. Neurotoxicology. 2001 Feb;22(1):99-107. doi: 10.1016/s0161-813x(00)00005-x. — View Citation

Ogren JA, Macey PM, Kumar R, Woo MA, Harper RM. Central autonomic regulation in congenital central hypoventilation syndrome. Neuroscience. 2010 Jun 2;167(4):1249-56. doi: 10.1016/j.neuroscience.2010.02.078. Epub 2010 Mar 6. — View Citation

Owens J, Spirito A, Marcotte A, McGuinn M, Berkelhammer L. Neuropsychological and Behavioral Correlates of Obstructive Sleep Apnea Syndrome in Children: A Preliminary Study. Sleep Breath. 2000;4(2):67-78. doi: 10.1007/BF03045026. — View Citation

Pae EK, Chien P, Harper RM. Intermittent hypoxia damages cerebellar cortex and deep nuclei. Neurosci Lett. 2005 Feb 28;375(2):123-8. doi: 10.1016/j.neulet.2004.10.091. Epub 2004 Dec 2. — View Citation

Paruthi, S. Evaluation of suspected obstructive sleep apnea in children. Edited by A.G. Hoppin, 2019.

Philby MF, Macey PM, Ma RA, Kumar R, Gozal D, Kheirandish-Gozal L. Reduced Regional Grey Matter Volumes in Pediatric Obstructive Sleep Apnea. Sci Rep. 2017 Mar 17;7:44566. doi: 10.1038/srep44566. — View Citation

Pierpaoli C, Barnett A, Pajevic S, Chen R, Penix LR, Virta A, Basser P. Water diffusion changes in Wallerian degeneration and their dependence on white matter architecture. Neuroimage. 2001 Jun;13(6 Pt 1):1174-85. doi: 10.1006/nimg.2001.0765. — View Citation

Pierpaoli C, Jezzard P, Basser PJ, Barnett A, Di Chiro G. Diffusion tensor MR imaging of the human brain. Radiology. 1996 Dec;201(3):637-48. doi: 10.1148/radiology.201.3.8939209. — View Citation

Redline S, Amin R, Beebe D, Chervin RD, Garetz SL, Giordani B, Marcus CL, Moore RH, Rosen CL, Arens R, Gozal D, Katz ES, Mitchell RB, Muzumdar H, Taylor HG, Thomas N, Ellenberg S. The Childhood Adenotonsillectomy Trial (CHAT): rationale, design, and challenges of a randomized controlled trial evaluating a standard surgical procedure in a pediatric population. Sleep. 2011 Nov 1;34(11):1509-17. doi: 10.5665/sleep.1388. — View Citation

Redline S, Tishler PV, Schluchter M, Aylor J, Clark K, Graham G. Risk factors for sleep-disordered breathing in children. Associations with obesity, race, and respiratory problems. Am J Respir Crit Care Med. 1999 May;159(5 Pt 1):1527-32. doi: 10.1164/ajrccm.159.5.9809079. — View Citation

Rosen CL, Larkin EK, Kirchner HL, Emancipator JL, Bivins SF, Surovec SA, Martin RJ, Redline S. Prevalence and risk factors for sleep-disordered breathing in 8- to 11-year-old children: association with race and prematurity. J Pediatr. 2003 Apr;142(4):383-9. doi: 10.1067/mpd.2003.28. — View Citation

Rosenzweig I, Glasser M, Crum WR, Kempton MJ, Milosevic M, McMillan A, Leschziner GD, Kumari V, Goadsby P, Simonds AK, Williams SC, Morrell MJ. Changes in Neurocognitive Architecture in Patients with Obstructive Sleep Apnea Treated with Continuous Positive Airway Pressure. EBioMedicine. 2016 May;7:221-9. doi: 10.1016/j.ebiom.2016.03.020. Epub 2016 Mar 25. — View Citation

Rubinstein, B.J. & Baldassari, C.M. An Update on the management of pediatric obstructive sleep apnea. Curr Treat Options Pediatr 1: 211-223, 2015.

Sahib, A., Roy, B., Song, X., Singh, S., Aysola, R., Kang, D.W., Woo, M.A. & Kumar, R. Brain axonal and myelin changes after positive airway pressure treatment in patients with obstructive sleep apnea. Joint Annual Meeting International Society for Magnetic Resonance in Medicine, Paris, France, 2018.

Series F, Cormier Y, La Forge J. [Physiopathology of obstructive sleep apneas]. Rev Mal Respir. 1989;6(5):397-407. French. — View Citation

Serrador JM, Freeman R. Enhanced Cholinergic Activity Improves Cerebral Blood Flow during Orthostatic Stress. Front Neurol. 2017 Mar 20;8:103. doi: 10.3389/fneur.2017.00103. eCollection 2017. — View Citation

Shereen A, Nemkul N, Yang D, Adhami F, Dunn RS, Hazen ML, Nakafuku M, Ning G, Lindquist DM, Kuan CY. Ex vivo diffusion tensor imaging and neuropathological correlation in a murine model of hypoxia-ischemia-induced thrombotic stroke. J Cereb Blood Flow Metab. 2011 Apr;31(4):1155-69. doi: 10.1038/jcbfm.2010.212. Epub 2010 Dec 8. — View Citation

Song SK, Sun SW, Ramsbottom MJ, Chang C, Russell J, Cross AH. Dysmyelination revealed through MRI as increased radial (but unchanged axial) diffusion of water. Neuroimage. 2002 Nov;17(3):1429-36. doi: 10.1006/nimg.2002.1267. — View Citation

Soultan Z, Wadowski S, Rao M, Kravath RE. Effect of treating obstructive sleep apnea by tonsillectomy and/or adenoidectomy on obesity in children. Arch Pediatr Adolesc Med. 1999 Jan;153(1):33-7. doi: 10.1001/archpedi.153.1.33. — View Citation

Spencer-Smith MM, Spittle AJ, Lee KJ, Doyle LW, Anderson PJ. Bayley-III Cognitive and Language Scales in Preterm Children. Pediatrics. 2015 May;135(5):e1258-65. doi: 10.1542/peds.2014-3039. Epub 2015 Apr 20. — View Citation

Suratt PM, Barth JT, Diamond R, D'Andrea L, Nikova M, Perriello VA Jr, Carskadon MA, Rembold C. Reduced time in bed and obstructive sleep-disordered breathing in children are associated with cognitive impairment. Pediatrics. 2007 Feb;119(2):320-9. doi: 10.1542/peds.2006-1969. — View Citation

Tabesh A, Jensen JH, Ardekani BA, Helpern JA. Estimation of tensors and tensor-derived measures in diffusional kurtosis imaging. Magn Reson Med. 2011 Mar;65(3):823-36. doi: 10.1002/mrm.22655. Epub 2010 Oct 28. Erratum In: Magn Reson Med. 2011 May;65(5):1507. — View Citation

Tan HL, Gozal D, Kheirandish-Gozal L. Obstructive sleep apnea in children: a critical update. Nat Sci Sleep. 2013 Sep 25;5:109-23. doi: 10.2147/NSS.S51907. — View Citation

Taylor HG, Bowen SR, Beebe DW, Hodges E, Amin R, Arens R, Chervin RD, Garetz SL, Katz ES, Moore RH, Morales KH, Muzumdar H, Paruthi S, Rosen CL, Sadhwani A, Thomas NH, Ware J, Marcus CL, Ellenberg SS, Redline S, Giordani B. Cognitive Effects of Adenotonsillectomy for Obstructive Sleep Apnea. Pediatrics. 2016 Aug;138(2):e20154458. doi: 10.1542/peds.2015-4458. — View Citation

Torretta S, Rosazza C, Pace ME, Iofrida E, Marchisio P. Impact of adenotonsillectomy on pediatric quality of life: review of the literature. Ital J Pediatr. 2017 Nov 25;43(1):107. doi: 10.1186/s13052-017-0424-2. — View Citation

Trip SA, Wheeler-Kingshott C, Jones SJ, Li WY, Barker GJ, Thompson AJ, Plant GT, Miller DH. Optic nerve diffusion tensor imaging in optic neuritis. Neuroimage. 2006 Apr 1;30(2):498-505. doi: 10.1016/j.neuroimage.2005.09.024. Epub 2005 Oct 20. — View Citation

Trosman I, Trosman SJ. Cognitive and Behavioral Consequences of Sleep Disordered Breathing in Children. Med Sci (Basel). 2017 Dec 1;5(4):30. doi: 10.3390/medsci5040030. — View Citation

Tummala S, Palomares J, Kang DW, Park B, Woo MA, Harper RM, Kumar R. Global and Regional Brain Non-Gaussian Diffusion Changes in Newly Diagnosed Patients with Obstructive Sleep Apnea. Sleep. 2016 Jan 1;39(1):51-7. doi: 10.5665/sleep.5316. — View Citation

Tummala S, Roy B, Vig R, Park B, Kang DW, Woo MA, Aysola R, Harper RM, Kumar R. Non-Gaussian Diffusion Imaging Shows Brain Myelin and Axonal Changes in Obstructive Sleep Apnea. J Comput Assist Tomogr. 2017 Mar/Apr;41(2):181-189. doi: 10.1097/RCT.0000000000000537. — View Citation

Urschitz MS, Guenther A, Eggebrecht E, Wolff J, Urschitz-Duprat PM, Schlaud M, Poets CF. Snoring, intermittent hypoxia and academic performance in primary school children. Am J Respir Crit Care Med. 2003 Aug 15;168(4):464-8. doi: 10.1164/rccm.200212-1397OC. Epub 2003 May 28. — View Citation

Veasey SC, Davis CW, Fenik P, Zhan G, Hsu YJ, Pratico D, Gow A. Long-term intermittent hypoxia in mice: protracted hypersomnolence with oxidative injury to sleep-wake brain regions. Sleep. 2004 Mar 15;27(2):194-201. doi: 10.1093/sleep/27.2.194. — View Citation

Vestergaard-Poulsen P, Hansen B, Ostergaard L, Jakobsen R. Microstructural changes in ischemic cortical gray matter predicted by a model of diffusion-weighted MRI. J Magn Reson Imaging. 2007 Sep;26(3):529-40. doi: 10.1002/jmri.21030. — View Citation

Wang DJ, Chen Y, Fernandez-Seara MA, Detre JA. Potentials and challenges for arterial spin labeling in pharmacological magnetic resonance imaging. J Pharmacol Exp Ther. 2011 May;337(2):359-66. doi: 10.1124/jpet.110.172577. Epub 2011 Feb 11. — View Citation

Wang J, Aguirre GK, Kimberg DY, Roc AC, Li L, Detre JA. Arterial spin labeling perfusion fMRI with very low task frequency. Magn Reson Med. 2003 May;49(5):796-802. doi: 10.1002/mrm.10437. — View Citation

Wang J, Zhang Y, Wolf RL, Roc AC, Alsop DC, Detre JA. Amplitude-modulated continuous arterial spin-labeling 3.0-T perfusion MR imaging with a single coil: feasibility study. Radiology. 2005 Apr;235(1):218-28. doi: 10.1148/radiol.2351031663. Epub 2005 Feb 16. — View Citation

Warach S, Mosley M, Sorensen AG, Koroshetz W. Time course of diffusion imaging abnormalities in human stroke. Stroke. 1996 Jul;27(7):1254-6. No abstract available. — View Citation

Warwick JP, Mason DG. Obstructive sleep apnoea syndrome in children. Anaesthesia. 1998 Jun;53(6):571-9. doi: 10.1046/j.1365-2044.1998.00370.x. — View Citation

Wolfe RM, Pomerantz J, Miller DE, Weiss-Coleman R, Solomonides T. Obstructive Sleep Apnea: Preoperative Screening and Postoperative Care. J Am Board Fam Med. 2016 Mar-Apr;29(2):263-75. doi: 10.3122/jabfm.2016.02.150085. — View Citation

Woo MA, Palomares JA, Macey PM, Fonarow GC, Harper RM, Kumar R. Global and regional brain mean diffusivity changes in patients with heart failure. J Neurosci Res. 2015 Apr;93(4):678-85. doi: 10.1002/jnr.23525. Epub 2014 Dec 13. — View Citation

Xu W, Chi L, Row BW, Xu R, Ke Y, Xu B, Luo C, Kheirandish L, Gozal D, Liu R. Increased oxidative stress is associated with chronic intermittent hypoxia-mediated brain cortical neuronal cell apoptosis in a mouse model of sleep apnea. Neuroscience. 2004;126(2):313-23. doi: 10.1016/j.neuroscience.2004.03.055. — View Citation

Yadav SK, Kumar R, Macey PM, Richardson HL, Wang DJ, Woo MA, Harper RM. Regional cerebral blood flow alterations in obstructive sleep apnea. Neurosci Lett. 2013 Oct 25;555:159-64. doi: 10.1016/j.neulet.2013.09.033. Epub 2013 Sep 26. — View Citation

Yang Q, Tress BM, Barber PA, Desmond PM, Darby DG, Gerraty RP, Li T, Davis SM. Serial study of apparent diffusion coefficient and anisotropy in patients with acute stroke. Stroke. 1999 Nov;30(11):2382-90. doi: 10.1161/01.str.30.11.2382. — View Citation

Ye FQ, Berman KF, Ellmore T, Esposito G, van Horn JD, Yang Y, Duyn J, Smith AM, Frank JA, Weinberger DR, McLaughlin AC. H(2)(15)O PET validation of steady-state arterial spin tagging cerebral blood flow measurements in humans. Magn Reson Med. 2000 Sep;44(3):450-6. doi: 10.1002/1522-2594(200009)44:33.0.co;2-0. — View Citation

Zhang JH, Fung SJ, Xi M, Sampogna S, Chase MH. Apnea produces neuronal degeneration in the pons and medulla of guinea pigs. Neurobiol Dis. 2010 Oct;40(1):251-64. doi: 10.1016/j.nbd.2010.05.032. Epub 2010 Jun 8. — View Citation

Zhao J, Han S, Zhang J, Wang G, Wang H, Xu Z, Tai J, Peng X, Guo Y, Liu H, Tian J, Jin X, Zheng L, Zhang J, Ni X. Association between mild or moderate obstructive sleep apnea-hypopnea syndrome and cognitive dysfunction in children. Sleep Med. 2018 Oct;50:132-136. doi: 10.1016/j.sleep.2018.04.009. Epub 2018 Jun 9. — View Citation

* Note: There are 160 references in allClick here to view all references

Outcome

Type Measure Description Time frame Safety issue
Primary Brain tissue changes between baseline and after adenotonsillectomy. The investigators will examine whether brain tissue changes reverse after adenotonsillectomy in pediatric obstructive sleep apnea subjects. The investigators will use diffusion tensor imaging based mean diffusivity and diffusion kurtosis imaging based mean kurtosis measures to examine brain tissue changes; both procedures examine brain tissue integrity with mean diffusivity showing reduced and mean kurtosis indicating increased values in acute tissue changes, and with mean diffusivity showing increased and mean kurtosis showing reduced values in chronic tissue changes. 6 months
Primary Regional brain cerebral blood flow changes between baseline and after adenotonsillectomy. Using arterial spin labeling magnetic resonance imaging, the investigators will assess if regional cerebral blood flow improves after standard obstructive sleep apnea surgery in pediatric subjects. The cerebral blood flow values reduce with hypo-perfusion and increase with hyper-perfusion. 6 months
Primary Neural response changes before and after adenotonsillectomy. Using functional magnetic resonance imaging, the investigators will examine whether neural responses in brain cognitive control sites to arithmetic cognitive challenge will improve after adenotonsillectomy compared to baseline in pediatric obstructive sleep apnea subjects. 6 months
Primary Cognitive symptoms examination after adenotonsillectomy surgery. The investigators will examine cognitive symptom changes after adenotonsillectomy in pediatric obstructive sleep apnea subjects. The investigators will use the Differential Ability Scale II for cognition evaluation. The Differential Ability Scale II scores range from 30-170, with reduced values indicating impaired cognition (General Conceptual Ability score <90, abnormal; General Conceptual Ability score > 90-170, normal). 6 months
Primary Cognition assessment after adenotonsillectomy in pediatric obstructive sleep apnea patients. The investigators will assess cognition changes after adenotonsillectomy in pediatric obstructive sleep apnea subjects. The investigators will use the NEuroPSYchological Assessment II for cognition examination. The NEuroPSYchological Assessment II scores will be lower with impaired cognition (Scaled score <8, abnormal; Scaled score 8-19, normal). 6 months
Primary Mood changes after adenotonsillectomy surgery. The investigators will examine mood changes after adenotonsillectomy in pediatric obstructive sleep apnea subjects using the Child Behavior Checklist. The Child Behavior Checklist scores will be higher with mood symptoms in pediatric obstructive sleep apnea compared to control children (t-scores, 65-69 borderline; >70 clinical). 6 months
See also
  Status Clinical Trial Phase
Completed NCT01276860 - The Use of Psychomotor Vigilance Testing in the Assessment of Pediatric Obstructive Sleep Apnea N/A
Terminated NCT03821831 - Treating Children With Obstructive Sleep Apnea After Surgery Failure
Recruiting NCT05052216 - Development of a Wearable Point of Care Monitoring Device for Pediatric Obstructive Sleep Apnea