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Clinical Trial Details — Status: Completed

Administrative data

NCT number NCT02840305
Other study ID # 38RC11.221
Secondary ID
Status Completed
Phase N/A
First received July 18, 2016
Last updated January 17, 2017
Start date April 2012
Est. completion date August 2016

Study information

Verified date January 2017
Source University Hospital, Grenoble
Contact n/a
Is FDA regulated No
Health authority
Study type Interventional

Clinical Trial Summary

Using the available data from psychophysics, cellular electrophysiology and functionnal neuroanatomy of visual pathway, current models of visual recognition suppose that the perception of scenes start with a parallel extraction of differents elementary visual characteristics to different spatial frequencies according to a default processing principle named : 'coarse-to-fine'.

According to this principle, the visual scene's analysis would be decomposed in two steps. Fisrt, the fast analysis of the global information borne by low frequency of the scene will provide an overview of the scene's structure and would enable a first perceptive categorisation which would be then refined, approved or denied by the latest analysis of the most local, detailed and precise information, carried by the very high spatial frequency of the scene.

The research carried out since several years is preparing a biologically plausible model and to find brain bases by different imaging techniques among healthy subjects but also patients with a brain lesion and patients with a peripheral lesion.

The main goal of this Magnetic Resonance Imaging study is to find brain bases of natural scenes's visual perception of the natural scenes.

Three studies in Magnetic Resonance Imaging will be conducted, during which subjects will have to categorize pictures of natural scenes filtered in spatial frequencies. The outcome of this study will allow to refine models of visual recognition, most of them based on analysis of spatial frequencies.


Recruitment information / eligibility

Status Completed
Enrollment 141
Est. completion date August 2016
Est. primary completion date March 2016
Accepts healthy volunteers Accepts Healthy Volunteers
Gender All
Age group 4 Years and older
Eligibility Inclusion Criteria for young adults :

- Subjet over 18 years and less than 30 years

- Affiliation to a social security

- Free signed consent

- Medical exam done before participation to the study

- Normal or corrected visual acuity

Exclusion Criteria four young adults :

- Counter-argument to MRI

- Pregnant, breast-feeding or parturient women

- Adults non protected or unable to express their consent

- Adults protected

- Important earing or visual disorder

- Neuropsychiatric disorder current or past passée ou présente (exept benign epilepsy)

- Severe affection on a general level (cardiac, respiratory, hematologic, renal, hépatic, cancerous)

- Drug treatment in progress (exept anti-epileptic drug) likely to de modulate brain activity

Inclusion Criteria for old adults :

- Subjet over 50 years

- Affiliation to a social security

- Free signed consent

- Medical exam done before participation to the study

- Normal or corrected visual acuity

Exclusion Criteria four old adults :

- Counter-argument to MRI

- Pregnant, breast-feeding or parturient women

- Adults non protected or unable to express their consent

- Adults protected

- Important earing or visual disorder

- Neuropsychiatric disorder current or past passée ou présente (exept benign epilepsy)

- Severe affection on a general level (cardiac, respiratory, hematologic, renal, hépatic, cancerous)

- Drug treatment in progress (exept anti-epileptic drug) likely to de modulate brain activity

Inclusion Criteria for children :

- Children between 4 and 12 years

- Affiliation to a social security

- Free signed consent

- Medical exam done before participation to the study

- Normal or corrected visual acuity

Exclusion Criteria four children :

- Counter-argument to MRI

- Important earing or visual disorder

- Important development disorder and/or acquisitions identified by parents and/or school teachers

- Neuropsychiatric disorder current or past passée ou présente (exept benign epilepsy)

- Severe affection on a general level (cardiac, respiratory, hematologic, renal, hépatic, cancerous)

- Drug treatment in progress (exept anti-epileptic drug) likely to de modulate brain activity

Study Design


Related Conditions & MeSH terms


Intervention

Other:
Evaluation of visual function

Magnetic Resonance Imaging


Locations

Country Name City State
France UniversityHospitalGrenoble La Tronche

Sponsors (1)

Lead Sponsor Collaborator
University Hospital, Grenoble

Country where clinical trial is conducted

France, 

References & Publications (38)

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Houdé O, Pineau A, Leroux G, Poirel N, Perchey G, Lanoë C, Lubin A, Turbelin MR, Rossi S, Simon G, Delcroix N, Lamberton F, Vigneau M, Wisniewski G, Vicet JR, Mazoyer B. Functional magnetic resonance imaging study of Piaget's conservation-of-number task in preschool and school-age children: a neo-Piagetian approach. J Exp Child Psychol. 2011 Nov;110(3):332-46. doi: 10.1016/j.jecp.2011.04.008. — View Citation

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Musel B, Chauvin A, Guyader N, Chokron S, Peyrin C. Is coarse-to-fine strategy sensitive to normal aging? PLoS One. 2012;7(6):e38493. doi: 10.1371/journal.pone.0038493. — View Citation

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Park S, Brady TF, Greene MR, Oliva A. Disentangling scene content from spatial boundary: complementary roles for the parahippocampal place area and lateral occipital complex in representing real-world scenes. J Neurosci. 2011 Jan 26;31(4):1333-40. doi: 10.1523/JNEUROSCI.3885-10.2011. — View Citation

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Peyrin C, Baciu M, Segebarth C, Marendaz C. Cerebral regions and hemispheric specialization for processing spatial frequencies during natural scene recognition. An event-related fMRI study. Neuroimage. 2004 Oct;23(2):698-707. — View Citation

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Peyrin C, Chokron S, Guyader N, Gout O, Moret J, Marendaz C. Neural correlates of spatial frequency processing: A neuropsychological approach. Brain Res. 2006 Feb 16;1073-1074:1-10. — View Citation

Peyrin C, Mermillod M, Chokron S, Marendaz C. Effect of temporal constraints on hemispheric asymmetries during spatial frequency processing. Brain Cogn. 2006 Dec;62(3):214-20. — View Citation

Peyrin C, Michel CM, Schwartz S, Thut G, Seghier M, Landis T, Marendaz C, Vuilleumier P. The neural substrates and timing of top-down processes during coarse-to-fine categorization of visual scenes: a combined fMRI and ERP study. J Cogn Neurosci. 2010 Dec;22(12):2768-80. doi: 10.1162/jocn.2010.21424. — View Citation

Peyrin C, Schwartz S, Seghier M, Michel C, Landis T, Vuilleumier P. Hemispheric specialization of human inferior temporal cortex during coarse-to-fine and fine-to-coarse analysis of natural visual scenes. Neuroimage. 2005 Nov 1;28(2):464-73. — View Citation

Poirel N, Mellet E, Houdé O, Pineau A. First came the trees, then the forest: developmental changes during childhood in the processing of visual local-global patterns according to the meaningfulness of the stimuli. Dev Psychol. 2008 Jan;44(1):245-53. doi: 10.1037/0012-1649.44.1.245. — View Citation

Poirel N, Simon G, Cassotti M, Leroux G, Perchey G, Lanoë C, Lubin A, Turbelin MR, Rossi S, Pineau A, Houdé O. The shift from local to global visual processing in 6-year-old children is associated with grey matter loss. PLoS One. 2011;6(6):e20879. doi: 10.1371/journal.pone.0020879. — View Citation

Schyns PG, Oliva A. Dr. Angry and Mr. Smile: when categorization flexibly modifies the perception of faces in rapid visual presentations. Cognition. 1999 Jan 1;69(3):243-65. — View Citation

Schyns PG, Oliva A. Flexible, diagnosticity-driven, rather than fixed, perceptually determined scale selection in scene and face recognition. Perception. 1997;26(8):1027-38. Review. — View Citation

Schyns, P. G., & Oliva, A. (1994). From blobs to boundary edges: Evidence for time- and spatial-scale-dependant scene recognition. American Psychological Society, 5, 195-200.

Shulman GL, Sullivan MA, Gish K, Sakoda WJ. The role of spatial-frequency channels in the perception of local and global structure. Perception. 1986;15(3):259-73. — View Citation

Shulman GL, Wilson J. Spatial frequency and selective attention to local and global information. Perception. 1987;16(1):89-101. — View Citation

Staudinger MR, Fink GR, Mackay CE, Lux S. Gestalt perception and the decline of global precedence in older subjects. Cortex. 2011 Jul-Aug;47(7):854-62. doi: 10.1016/j.cortex.2010.08.001. — View Citation

Van Essen, D. C., & DeYoe, E. A. (1995). Concurrent processing in the primate visual cortex. In M. Gazzaniga (Ed.), The cognitive Neurosciences (pp. 383-400). Cambridge: Bradford Book.

Vasseur F, Delon-Martin C, Bordier C, Warnking J, Lamalle L, Segebarth C, Dojat M. fMRI retinotopic mapping at 3 T: benefits gained from correcting the spatial distortions due to static field inhomogeneity. J Vis. 2010 Oct 26;10(12):30. doi: 10.1167/10.12.30. — View Citation

Warnking J, Dojat M, Guérin-Dugué A, Delon-Martin C, Olympieff S, Richard N, Chéhikian A, Segebarth C. fMRI retinotopic mapping--step by step. Neuroimage. 2002 Dec;17(4):1665-83. — View Citation

* Note: There are 38 references in allClick here to view all references

Outcome

Type Measure Description Time frame Safety issue
Primary Identify brain bases of natural scenes's visual perception of the natural scenes Evaluation 1 = Visual tasks Experience 1 : Brain bases of spatial frequencies treatment Experience 2 : Brain bases of Computer to Film (CtF) natural scenes analysis MRI exam Experience 3 : Part of parahippocampal gyrus in Computer to Film (CtF) natural scenes analysis MRI exam About 30 minutes
Evaluation 2 = Retinotopy : only adults that have shown activations inside occipital cortex during evaluation 1 MRI exam about 50 minutes
About 80 minutes
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