Document Detail

Effects of high-rate pulse trains on electrode discrimination in cochlear implant users.
MedLine Citation:
PMID:  19447763     Owner:  NLM     Status:  MEDLINE    
Overcoming issues related to abnormally high neural synchrony in response to electrical stimulation is one aspect in improving hearing with a cochlear implant. Desynchronization of electrical stimuli have shown benefits in neural encoding of electrical signals and improvements in psychophysical tasks. In the present study, 10 participants with either CII or HiRes 90k Advanced Bionics devices were tested for the effects of desynchronizing constant-amplitude high-rate (5,000 Hz) pulse trains on electrode discrimination of sinusoidal stimuli (1,000 Hz). When averaged across the sinusoidal dynamic range, overall improvements in electrode discrimination with high-rate pulses were found for 8 of 10 participants. This effect was significant for the group (p = .003). Nonmonotonic patterns of electrode discrimination as a function of sinusoidal stimulation level were observed. By providing additional spectral channels, it is possible that clinical implementation of constant-amplitude high-rate pulse trains in a signal processing strategy may improve performance with the device.
Christina L Runge-Samuelson
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Trends in amplification     Volume:  13     ISSN:  1084-7138     ISO Abbreviation:  Trends Amplif     Publication Date:  2009 Jun 
Date Detail:
Created Date:  2009-05-18     Completed Date:  2009-07-09     Revised Date:  2010-09-24    
Medline Journal Info:
Nlm Unique ID:  9709254     Medline TA:  Trends Amplif     Country:  United States    
Other Details:
Languages:  eng     Pagination:  76-86     Citation Subset:  IM    
Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin, 9200 W. Wisconsin Avenue, Milwaukee, WI 53226, USA.
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MeSH Terms
Acoustic Stimulation
Aged, 80 and over
Auditory Pathways / physiopathology*
Auditory Perception*
Auditory Threshold
Cochlear Implantation*
Cochlear Implants*
Deafness / physiopathology,  rehabilitation*
Equipment Design
Hearing Impaired Persons*
Middle Aged
Rehabilitation of Hearing Impaired*
Signal Detection, Psychological*
Signal Processing, Computer-Assisted
Young Adult
Grant Support
R03 DC 006361/DC/NIDCD NIH HHS; R03 DC006361-01A1/DC/NIDCD NIH HHS

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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