Scott S K, Blank C C, Rosen S, Wise R J
Institute of Cognitive Neuroscience and Department of Phonetics and Linguistics, University College London, MRC Clinical Sciences Centre, Cyclotron Unit, Hammersmith Hospital, London, UK.
Brain. 2000 Dec;123 Pt 12(Pt 12):2400-6. doi: 10.1093/brain/123.12.2400.
It has been proposed that the identification of sounds, including species-specific vocalizations, by primates depends on anterior projections from the primary auditory cortex, an auditory pathway analogous to the ventral route proposed for the visual identification of objects. We have identified a similar route in the human for understanding intelligible speech. Using PET imaging to identify separable neural subsystems within the human auditory cortex, we used a variety of speech and speech-like stimuli with equivalent acoustic complexity but varying intelligibility. We have demonstrated that the left superior temporal sulcus responds to the presence of phonetic information, but its anterior part only responds if the stimulus is also intelligible. This novel observation demonstrates a left anterior temporal pathway for speech comprehension.
有人提出，灵长类动物对声音（包括特定物种的发声）的识别依赖于初级听觉皮层的前向投射，这是一条与视觉识别物体时所提出的腹侧通路类似的听觉通路。我们已经在人类中发现了一条理解可理解语音的类似通路。利用正电子发射断层扫描（PET）成像来识别人类听觉皮层内可分离的神经子系统，我们使用了各种具有同等声学复杂性但可懂度不同的语音和类语音刺激。我们已经证明，左侧颞上沟对语音信息的存在有反应，但其前部仅在刺激也是可理解的情况下才会有反应。这一新颖的观察结果证明了一条用于言语理解的左前颞叶通路。
