Ohl F W, Scheich H
Federal Institute for Neurobiology, Brenneckestrasse 6, D-39118 Magdeburg, Germany.
Proc Natl Acad Sci U S A. 1997 Aug 19;94(17):9440-4. doi: 10.1073/pnas.94.17.9440.
Psychophysical experiments have shown that the discrimination of human vowels chiefly relies on the frequency relationship of the first two peaks F1 and F2 of the vowel's spectral envelope. It has not been possible, however, to relate the two-dimensional (F1, F2)-relationship to the known organization of frequency representation in auditory cortex. We demonstrate that certain spectral integration properties of neurons are topographically organized in primary auditory cortex in such a way that a transformed (F1,F2) relationship sufficient for vowel discrimination is realized.
心理物理学实验表明，人类元音的辨别主要依赖于元音频谱包络前两个峰值F1和F2的频率关系。然而，尚未能够将二维（F1，F2）关系与听觉皮层中已知的频率表征组织联系起来。我们证明，神经元的某些频谱整合特性在初级听觉皮层中呈拓扑组织，从而实现了足以进行元音辨别的变换后的（F1，F2）关系。
