"Hearing faces and seeing voices": Amodal coding of person identity in the human brain.
"Hearing faces and seeing voices": Amodal coding of person identity in the human brain.
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DOI：
10.1038/srep37494
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发表时间：
2016-11-24
影响因子：
4.6
通讯作者：
Belin P
中科院分区：
文献类型：
--
作者：
Awwad Shiekh Hasan B;Valdes-Sosa M;Gross J;Belin P
识别熟悉的人是由大脑通过结合几种感官模式的线索来实现的，包括一个人的脸和她的声音。在这里，我们使用功能磁共振(FMRI)和全脑探照灯多体素模式分析(MVPA)来搜索局部fMRI模式可以导致身份分类的区域作为感觉通道的函数。我们发现了几个支持基于fMRI反应的人脸或语音刺激分类的区域，这与以前的报道一致；分类图在右后上颞沟(PSTS)的单个区域跨通道重叠。值得注意的是，我们还发现了几个皮质区域，大多位于颞中回，在这些区域，局部的fMRI模式导致了身份“交叉分类”：声音身份可以根据对人脸的功能磁共振反应进行分类，或者相反，或者两者兼而有之。这些发现暗示了一系列从输入通道中越来越抽象的大脑皮层身份表征。
Recognizing familiar individuals is achieved by the brain by combining cues from several sensory modalities, including the face of a person and her voice. Here we used functional magnetic resonance (fMRI) and a whole-brain, searchlight multi-voxel pattern analysis (MVPA) to search for areas in which local fMRI patterns could result in identity classification as a function of sensory modality. We found several areas supporting face or voice stimulus classification based on fMRI responses, consistent with previous reports; the classification maps overlapped across modalities in a single area of right posterior superior temporal sulcus (pSTS). Remarkably, we also found several cortical areas, mostly located along the middle temporal gyrus, in which local fMRI patterns resulted in identity “cross-classification”: vocal identity could be classified based on fMRI responses to the faces, or the reverse, or both. These findings are suggestive of a series of cortical identity representations increasingly abstracted from the input modality.
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