Fang Fang, He Sheng
Department of Psychology, University of Minnesota, 75 East River Road, Minneapolis, MN 55455, USA.
Neuron. 2005 Mar 3;45(5):793-800. doi: 10.1016/j.neuron.2005.01.037.
Are there neurons representing specific views of objects in the human visual system? A visual selective adaptation method was used to address this question. After visual adaptation to an object viewed either 15 or 30 degrees from one side, when the same object was subsequently presented near the frontal view, the perceived viewing directions were biased in a direction opposite to that of the adapted viewpoint. This aftereffect can be obtained with spatially nonoverlapping adapting and test stimuli, and it depends on the global representation of the adapting stimuli. Viewpoint aftereffects were found within, but not across, categories of objects tested (faces, cars, wire-like objects). The magnitude of this aftereffect depends on the angular difference between the adapting and test viewing angles and grows with increasing duration of adaptation. These results support the existence of object-selective neurons tuned to specific viewing angles in the human visual system.
在人类视觉系统中是否存在代表物体特定视图的神经元？为了解决这个问题，采用了一种视觉选择性适应方法。在从一侧对以15度或30度视角观察的物体进行视觉适应后，当随后在正视图附近呈现相同物体时，感知到的观察方向会偏向与适应视角相反的方向。这种后效应可以通过空间上不重叠的适应刺激和测试刺激获得，并且它取决于适应刺激的整体表征。在所测试的物体类别（面部、汽车、线状物体）内发现了视角后效应，但在不同类别之间未发现。这种后效应的大小取决于适应视角和测试视角之间的角度差异，并随着适应持续时间的增加而增大。这些结果支持了在人类视觉系统中存在针对特定视角进行调谐的物体选择性神经元。
