TY - JOUR
T1 - Neuroperceptual differences in consonant and vowel discrimination
T2 - As revealed by direct cortical electrical interference
AU - Boatman, D.
AU - Hall, C.
AU - Goldstein, M. H.
AU - Lesser, R.
AU - Gordon, B.
N1 - Funding Information:
Acknowledgements. This research was supported by grants from The National Institute on Deafness and Other Communication Disorders (R03-DC0188l) to the first author, The National Institute of Neurological Disorders and Stroke (ROl-NS26553, ROl-29973), the Seaver Foundation, the Johns Hopkins Center for Speech Processing, and the McDonnellPew Program in Cognitive Neuroscience. We thank Dr. Pamela Talalay, Erika Goodhart, Pamela Schwerdt, Brian Rothlisberger, and Barbara Cysyk for technical support. Thanks also to Drs. Nathan Crone and John Hart for producing the figures, and to David Gan at the Peabody Institute for assisting with stimulus generation. This paper was greatly improved by the thoughtful and constructive comments of two anonymous reviewers. Special thanks are due to Dr. Stephen Anderson who has willingly shared his time and knowledge with the first author and whose influence cannot be measured.
PY - 1997
Y1 - 1997
N2 - The effects of direct cortical electrical interference on consonant and vowel discrimination were investigated in five patients with implanted subdural electrode arrays. Without electrical interference, patients' performance discriminating consonants and vowels was intact. With electrical interference, consonant discrimination was impaired at one electrode site in each patient on the superior temporal gyrus of the lateral left perisylvian cortex. Conversely, vowel and tone discrimination remained relatively intact when tested with electrical interference at the same site. Analysis of patients' consonant. discrimination errors revealed that neither differences in acoustic temporal structure nor syllable position fully account for the consonant-vowel perceptual dissociations elicited. Our data suggest that at the cortical level consonant and vowel perception are intrinsically distinct perceptual phenomena. The selective impairment of consonant, but not vowel, discrimination further suggests that consonant and vowel perception are distinguished by differences in relative dependence on the functional - perhaps integrative - resources of the left lateral superior temporal gyrus.
AB - The effects of direct cortical electrical interference on consonant and vowel discrimination were investigated in five patients with implanted subdural electrode arrays. Without electrical interference, patients' performance discriminating consonants and vowels was intact. With electrical interference, consonant discrimination was impaired at one electrode site in each patient on the superior temporal gyrus of the lateral left perisylvian cortex. Conversely, vowel and tone discrimination remained relatively intact when tested with electrical interference at the same site. Analysis of patients' consonant. discrimination errors revealed that neither differences in acoustic temporal structure nor syllable position fully account for the consonant-vowel perceptual dissociations elicited. Our data suggest that at the cortical level consonant and vowel perception are intrinsically distinct perceptual phenomena. The selective impairment of consonant, but not vowel, discrimination further suggests that consonant and vowel perception are distinguished by differences in relative dependence on the functional - perhaps integrative - resources of the left lateral superior temporal gyrus.
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U2 - 10.1016/S0010-9452(97)80006-8
DO - 10.1016/S0010-9452(97)80006-8
M3 - Article
C2 - 9088723
AN - SCOPUS:0030949811
SN - 0010-9452
VL - 33
SP - 83
EP - 98
JO - Cortex
JF - Cortex
IS - 1
ER -