Neuroperceptual differences in consonant and vowel discrimination: As revealed by direct cortical electrical interference
Neuroperceptual differences in consonant and vowel discrimination: As revealed by direct cortical electrical interference
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DOI：
10.1016/s0010-9452(97)80006-8
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发表时间：
1997-03-01
期刊：
影响因子：
3.6
通讯作者：
Gordon, B
中科院分区：
文献类型：
--
作者：
Boatman, D;Hall, C;Gordon, B
在五名植入硬膜下电极阵列的患者中研究了直接皮质电干扰对辅音和元音辨别的影响。在没有电干扰的情况下，患者辨别辅音和元音的能力完好无损。由于电干扰，每位患者左侧外侧皮质颞上回的一个电极部位的辅音辨别能力受到损害。相反，当在同一地点进行电干扰测试时，元音和音调辨别力保持相对完整。对患者辅音辨别错误的分析表明，声学时间结构和音节位置的差异都不能完全解释所引起的辅音-元音知觉分离。我们的数据表明，在皮质水平上，辅音和元音感知本质上是不同的感知现象。辅音而非元音辨别的选择性损伤进一步表明，辅音和元音感知的区别在于对左侧颞上回功能（也许是整合）资源的相对依赖性的差异。
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.