Kadipasaoglu Cihan Mehmet, Conner Christopher Richard, Baboyan Vatche George, Rollo Matthew, Pieters Thomas Allyn, Tandon Nitin
Vivian Smith Department of Neurosurgery, Univ. of Texas Medical School at Houston, Houston, Texas, United States of America.
Memorial Hermann Hospital, Texas Medical Center, Houston, Texas, United States of America.
PLoS One. 2017 Nov 30;12(11):e0188834. doi: 10.1371/journal.pone.0188834. eCollection 2017.
Prevailing theories suggests that cortical regions responsible for face perception operate in a serial, feed-forward fashion. Here, we utilize invasive human electrophysiology to evaluate serial models of face-processing via measurements of cortical activation, functional connectivity, and cortico-cortical evoked potentials. We find that task-dependent changes in functional connectivity between face-selective regions in the inferior occipital (f-IOG) and fusiform gyrus (f-FG) are bidirectional, not feed-forward, and emerge following feed-forward input from early visual cortex (EVC) to both of these regions. Cortico-cortical evoked potentials similarly reveal independent signal propagations between EVC and both f-IOG and f-FG. These findings are incompatible with serial models, and support a parallel, distributed network underpinning face perception in humans.
主流理论认为，负责面部感知的皮质区域以串行、前馈的方式运作。在此，我们利用侵入性人体电生理学，通过测量皮质激活、功能连接和皮质间诱发电位，来评估面部处理的串行模型。我们发现，枕下回（f-IOG）和梭状回（f-FG）中面部选择性区域之间的功能连接的任务依赖性变化是双向的，而非前馈性的，并且是在早期视觉皮层（EVC）向这两个区域的前馈输入之后出现的。皮质间诱发电位同样揭示了EVC与f-IOG和f-FG之间独立的信号传播。这些发现与串行模型不相符，并支持了一个支撑人类面部感知的并行、分布式网络。
