Perrett D I, Oram M W, Harries M H, Bevan R, Hietanen J K, Benson P J, Thomas S
Psychological Laboratory, University of St Andrews, Fife, UK.
Exp Brain Res. 1991;86(1):159-73. doi: 10.1007/BF00231050.
An investigation was made into the sensitivity of cells in the macaque superior temporal sulcus (STS) to the sight of different perspective views of the head. This allowed assessment of (a) whether coding was 'viewer-centred' (view specific) or 'object-centred' (view invariant) and (b) whether viewer-centred cells were preferentially tuned to 'characteristic' views of the head. The majority of cells (110) were found to be viewer-centred and exhibited unimodal tuning to one view. 5 cells displayed object-centred coding responding equally to all views of the head. A further 5 cells showed 'mixed' properties, responding to all views of the head but also discriminating between views. 6 out of 56 viewer and object-centred cells exhibited selectivity for face identity or species. Tuning to view varied in sharpness. For most (54/73) cells the angle of perspective rotation reducing response to half maximal was 45-70 degrees but for 19/73 it was greater than 90 degrees. More cells were optimally tuned to characteristic views of the head (the full face or profile) than to other views. Some cells were, however, found tuned to intermediate views throughout the full 360 degree range. This coding of many distinct head views may have a role in the analysis of social signals based on the interpretation of the direction of other individuals' attention.
对猕猴颞上沟（STS）中的细胞对视头部不同透视图的敏感性进行了研究。这使得能够评估：（a）编码是以“观察者为中心”（视图特定）还是以“物体为中心”（视图不变）；（b）以观察者为中心的细胞是否优先调整至头部的“特征”视图。发现大多数细胞（110个）是以观察者为中心的，并且对一种视图表现出单峰调谐。5个细胞显示以物体为中心的编码，对头部的所有视图均有同等反应。另外5个细胞表现出“混合”特性，对头部的所有视图均有反应，但也能区分不同视图。56个以观察者和物体为中心的细胞中有6个对脸部身份或物种表现出选择性。对视图的调谐清晰度各不相同。对于大多数（54/73）细胞，视角旋转使反应降至最大反应一半时的角度为45 - 70度，但对于19/73细胞，该角度大于90度。与其他视图相比，更多细胞对头部的特征视图（全脸或侧面）进行了最佳调谐。然而，发现一些细胞在整个360度范围内对中间视图进行了调谐。基于对他人注意力方向的解读，对许多不同头部视图的这种编码可能在社交信号分析中发挥作用。
