Effects of TMS to occipital face area on the perception of face viewpoint cued only by shape changes in the external contour of the face
Effects of TMS to occipital face area on the perception of face viewpoint cued only by shape changes in the external contour of the face
复制标题
TMS 对枕叶面部区域的影响仅由面部外部轮廓的形状变化提示的面部视点感知
DOI：
10.1167/15.12.432
复制
发表时间：
2015
影响因子：
1.8
通讯作者：
Lawrence S
中科院分区：
文献类型：
--
作者：
Lawrence S
面部外轮廓的变化充当面部观点的线索，并且可以使用径向频率（RF）模式刺激来捕获这些变化（Wilson等人，2000年）。人脸视点后效（FVA）是一种视错觉，其中对左脸的适应导致前脸看起来像右脸，反之亦然（Fang和He，2005）。枕面部区域（OFA）与FVA（Fang等人，2007）和早期面部处理（Haxby等人，2000; Pitcher等人，2007年）。我们使用合成头部轮廓RF模式刺激复制FVA。然后，我们将经颅磁刺激（TMS）应用于OFA和附近的形状处理区域LO 2（Silson等人，2013），在适应面向前方或侧面的刺激后对相同刺激的视点辨别期间。TMS对OFA的视角辨别力显著差于TMS对LO 2的视角辨别力，但两种条件与对照条件均无显著差异。因此，我们无法确定TMS对辨别力的影响是归因于从TMS到LO 2的性能促进，还是从TMS到OFA的性能抑制。此外，我们没有发现TMS对任何脑区的FVA的大小的影响。我们的结论是，我们的差异效应TMS的LO 2和OFA的观点歧视可能表明的因果关系的作用，OFA在处理的形状线索的观点，但更多的数据将被收购，以进一步澄清我们的结果。这与Silson et al. s（2013）分别在LO 1和LO 2中提出了平行的取向和形状加工机制。我们添加了一个潜在的第三个并行机制的形状信息，是相关的OFA中的人脸处理。
Changes in the outer contour of a face act as a cue to face viewpoint, and these changes can be captured using radial frequency (RF) pattern stimuli (Wilson et al., 2000). The face viewpoint aftereffect (FVA) is a visual illusion where adaptation to a left-facing face causes a front-facing face to appear as right-facing and vice versa (Fang and He, 2005). The occipital face area (OFA) has been implicated in both the FVA (Fang et al., 2007) and early face processing (Haxby et al., 2000; Pitcher et al., 2007). We replicated the FVA using synthetic head outline RF pattern stimuli. We then applied transcranial magnetic stimulation (TMS) to OFA and a nearby shape processing area, LO2 (Silson et al., 2013), during viewpoint discriminations of the same stimuli following adaptation to a forward-or lateral-facing stimulus. TMS to OFA resulted in significantly worse viewpoint discrimination than TMS to LO2, however neither condition was significantly different from control conditions. It was therefore impossible to determine whether our effect of TMS on discrimination was attributable to a facilitation of performance from TMS to LO2, or an inhibition of performance from TMS to OFA. In addition we found no effect of TMS to any brain regions on the magnitude of the FVA. We conclude that our differential effect of TMS to LO2 and OFA on viewpoint discrimination likely indicates a causal role for OFA in the processing of shape cues to viewpoint, however more data will be acquired to further clarify our results. This would be consistent with Silson et al.’s (2013) suggestion of parallel mechanisms for orientation and shape processing in LO1 and LO2, respectively. We add a potential third parallel mechanism for shape information that is relevant to face processing in OFA.