Tradeoff Between Spatial and Temporal Resolution

Deafness Clinical Trial

Official title:

Tradeoff Between Spatial Resolution of Neural Excitation and Temporal Rate Processing

Clinical Trial Details — Status: Terminated

Administrative data

• NCT number: NCT03867058
• Other study ID #: Zhou_R01_study1
• Status: Terminated
• Start date: October 1, 2019
• Est. completion date: April 4, 2023

Study information

• Verified date: April 2023
• Source: East Carolina University
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

In this study, investigators will examine how temporal rate processing might be affected when the width of neural excitation narrows. The manipulation of neural excitation width will be achieved for example by changing electrode configurations or stimulating single versus multiple electrodes simultaneously. Investigators will then measure if the extent to which rate processing is affected by spatially restricted stimulation can predict a subject's overall speech recognition and predict also whether the subject is likely to benefit from a focused electrode configuration. Lastly, investigators will introduce and test a novel current focusing strategy where current focusing is applied in a channel specific manner and quantify if this intervention improves speech recognition. The primary endpoint of the study is speech recognition, and the secondary endpoint is psychophysical sensitivity to stimulation rate change.

Recruitment information / eligibility

• Status: Terminated
• Enrollment: 53
• Est. completion date: April 4, 2023
• Est. primary completion date: April 4, 2023
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: All
• Age group: 15 Years and older

Eligibility

Inclusion Criteria:

• Native speakers of English

• Cochlear Nucleus cochlear implant users or Advanced Bionics users

• Postlingually deafened

• Has had device experience for at least one year

• Can be child or adult at the time of enrollment

Exclusion Criteria:

• None

Related Conditions & MeSH terms

• Deafness

Intervention

Behavioral:
• Electrode selection/electrode configuration
Electrodes will be chosen based on their spatial tuning curves. Focused stimulation will be applied to electrodes with good temporal processing acuity.

Locations

Country	Name	City	State
United States	Department of Communication Sciences and Disorders, ECU	Greenville	North Carolina

Sponsors (1)

Lead Sponsor	Collaborator
East Carolina University

Country where clinical trial is conducted

United States, 

References & Publications (24)

Berenstein CK, Mens LH, Mulder JJ, Vanpoucke FJ. Current steering and current focusing in cochlear implants: comparison of monopolar, tripolar, and virtual channel electrode configurations. Ear Hear. 2008 Apr;29(2):250-60. doi: 10.1097/aud.0b013e3181645336. — View Citation

Bierer JA, Litvak L. Reducing Channel Interaction Through Cochlear Implant Programming May Improve Speech Perception: Current Focusing and Channel Deactivation. Trends Hear. 2016 Jun 17;20:2331216516653389. doi: 10.1177/2331216516653389. — View Citation

Boulet J, White M, Bruce IC. Temporal Considerations for Stimulating Spiral Ganglion Neurons with Cochlear Implants. J Assoc Res Otolaryngol. 2016 Feb;17(1):1-17. doi: 10.1007/s10162-015-0545-5. — View Citation

Carlyon RP, Deeks JM. Combined neural and behavioural measures of temporal pitch perception in cochlear implant users. J Acoust Soc Am. 2015 Nov;138(5):2885-905. doi: 10.1121/1.4934275. — View Citation

Carlyon RP, Deeks JM. Limitations on rate discrimination. J Acoust Soc Am. 2002 Sep;112(3 Pt 1):1009-25. doi: 10.1121/1.1496766. — View Citation

Chatterjee M, Galvin JJ 3rd, Fu QJ, Shannon RV. Effects of stimulation mode, level and location on forward-masked excitation patterns in cochlear implant patients. J Assoc Res Otolaryngol. 2006 Mar;7(1):15-25. doi: 10.1007/s10162-005-0019-2. Epub 2005 Nov 4. — View Citation

Dingemanse JG, Frijns JH, Briaire JJ. Psychophysical assessment of spatial spread of excitation in electrical hearing with single and dual electrode contact maskers. Ear Hear. 2006 Dec;27(6):645-57. doi: 10.1097/01.aud.0000246683.29611.1b. — View Citation

Eggermont JJ. Peripheral auditory adaptation and fatigue: a model oriented review. Hear Res. 1985 Apr;18(1):57-71. doi: 10.1016/0378-5955(85)90110-8. — View Citation

Galvin JJ 3rd, Fu QJ. Effects of stimulation rate, mode and level on modulation detection by cochlear implant users. J Assoc Res Otolaryngol. 2005 Sep;6(3):269-79. doi: 10.1007/s10162-005-0007-6. — View Citation

Goldsworthy RL, Shannon RV. Training improves cochlear implant rate discrimination on a psychophysical task. J Acoust Soc Am. 2014 Jan;135(1):334-41. doi: 10.1121/1.4835735. — View Citation

Green T, Faulkner A, Rosen S. Variations in carrier pulse rate and the perception of amplitude modulation in cochlear implant users. Ear Hear. 2012 Mar-Apr;33(2):221-30. doi: 10.1097/AUD.0b013e318230fff8. — View Citation

Javel E, Shepherd RK. Electrical stimulation of the auditory nerve. III. Response initiation sites and temporal fine structure. Hear Res. 2000 Feb;140(1-2):45-76. doi: 10.1016/s0378-5955(99)00186-0. — View Citation

Kreft HA, Oxenham AJ, Nelson DA. Modulation rate discrimination using half-wave rectified and sinusoidally amplitude modulated stimuli in cochlear-implant users. J Acoust Soc Am. 2010 Feb;127(2):656-9. doi: 10.1121/1.3282947. — View Citation

Kwon BJ, van den Honert C. Effect of electrode configuration on psychophysical forward masking in cochlear implant listeners. J Acoust Soc Am. 2006 May;119(5 Pt 1):2994-3002. doi: 10.1121/1.2184128. — View Citation

Landsberger DM. Effects of modulation wave shape on modulation frequency discrimination with electrical hearing. J Acoust Soc Am. 2008 Aug;124(2):EL21-7. doi: 10.1121/1.2947624. — View Citation

Macherey O, Carlyon RP. Re-examining the upper limit of temporal pitch. J Acoust Soc Am. 2014 Dec;136(6):3186. doi: 10.1121/1.4900917. — View Citation

McDermott HJ, McKay CM. Musical pitch perception with electrical stimulation of the cochlea. J Acoust Soc Am. 1997 Mar;101(3):1622-31. doi: 10.1121/1.418177. — View Citation

McKay CM, McDermott HJ. Loudness perception with pulsatile electrical stimulation: the effect of interpulse intervals. J Acoust Soc Am. 1998 Aug;104(2 Pt 1):1061-74. doi: 10.1121/1.423316. — View Citation

Miller CA, Woo J, Abbas PJ, Hu N, Robinson BK. Neural masking by sub-threshold electric stimuli: animal and computer model results. J Assoc Res Otolaryngol. 2011 Apr;12(2):219-32. doi: 10.1007/s10162-010-0249-9. Epub 2010 Nov 16. — View Citation

Moore BC. Frequency difference limens for short-duration tones. J Acoust Soc Am. 1973 Sep;54(3):610-9. doi: 10.1121/1.1913640. No abstract available. — View Citation

Nelson DA, Kreft HA, Anderson ES, Donaldson GS. Spatial tuning curves from apical, middle, and basal electrodes in cochlear implant users. J Acoust Soc Am. 2011 Jun;129(6):3916-33. doi: 10.1121/1.3583503. — View Citation

Nilsson M, Soli SD, Sullivan JA. Development of the Hearing in Noise Test for the measurement of speech reception thresholds in quiet and in noise. J Acoust Soc Am. 1994 Feb;95(2):1085-99. doi: 10.1121/1.408469. — View Citation

Pijl S, Schwarz DW. Melody recognition and musical interval perception by deaf subjects stimulated with electrical pulse trains through single cochlear implant electrodes. J Acoust Soc Am. 1995 Aug;98(2 Pt 1):886-95. doi: 10.1121/1.413514. — View Citation

Thornton AR, Raffin MJ. Speech-discrimination scores modeled as a binomial variable. J Speech Hear Res. 1978 Sep;21(3):507-18. doi: 10.1044/jshr.2103.507. — View Citation

* Note: There are 24 references in all — Click here to view all references

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Sensitivity to stimulation rate change at threshold	Subjects' psychophysical detection thresholds will be measured as a function of the rate of stimulation delivered to selected electrodes and selected electrode configuration	starting 6 months post award notice and will take up to 4 years to complete
Primary	Discrimination of stimulation rate	subjects' ability to discriminate stimulation rates will be measured as a function of base stimulation rates at selected electrodes and selected electrode configuration.	starting 6 months post award notice and will take up to 4 years to complete
Secondary	Speech recognition	Speech recognition in quiet and in noise will be measured under three conditions: 1. the traditional monopolar electrode configuration; 2. using current focusing on electrodes that show good sensitivity to rate change; 3. using current focusing on all electrodes.	starting 6 months post award notice and will take up to 4 years to complete