The mismatch negativity cortical evoked potential elicited by speech in cochlear-implant users.
The mismatch negativity (MMN) event-related potential is a non-task related neurophysiologic index of auditory discrimination. The MMN was elicited in eight cochlear implant recipients by the synthesized speech stimulus pair /da/ and /ta/. The response was remarkably similar to the MMN measured in normal-hearing individuals to the same stimuli. The results suggest that the central auditory system can process certain aspects of speech consistently, independent of whether the stimuli are processed through a normal cochlea or mediated by a cochlear prosthesis. The MMN shows promise as a measure for the objective evaluation of cochlear-implant function, and for the study of central neurophysiological processes underlying speech perception.
Kraus
N
N
Department of Communication Sciences and Disorders, Northwestern University, Evanston, Illinois.
Micco
A G
AG
Koch
D B
DB
McGee
T
T
Carrell
T
T
Sharma
A
A
Wiet
R J
RJ
Weingarten
C Z
CZ
D000161:Acoustic Stimulation; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003054:Cochlear Implants; D005072:Evoked Potentials, Auditory / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013067:Speech Perception / Q000502:physiology*