Neuroperceptual differences in consonant and vowel discrimination: As revealed by direct cortical electrical interference

被引:59
作者
Boatman, D
Hall, C
Goldstein, MH
Lesser, R
Gordon, B
机构
[1] JOHNS HOPKINS UNIV, SCH MED, DEPT NEUROSURG, BALTIMORE, MD 21287 USA
[2] JOHNS HOPKINS UNIV, SCH MED, DEPT BIOSTAT, BALTIMORE, MD 21287 USA
[3] JOHNS HOPKINS UNIV, SCH MED, DEPT ELECT & COMP ENGN, BALTIMORE, MD 21287 USA
[4] JOHNS HOPKINS UNIV, SCH MED, DEPT COGNIT SCI, BALTIMORE, MD 21287 USA
[5] JOHNS HOPKINS UNIV, SCH MED, ZANVYL KRIEGER MIND BRAIN INST, BALTIMORE, MD 21287 USA
关键词
D O I
10.1016/S0010-9452(97)80006-8
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
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.
引用
收藏
页码:83 / 98
页数:16
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