Schweinberger Stefan R, Kloth Nadine, Jenkins Rob
Department of General Psychology, University of Jena, Germany.
Neuroreport. 2007 May 7;18(7):693-6. doi: 10.1097/WNR.0b013e3280c1e2d2.
Eye gaze is an important social signal, and humans can accurately determine gaze direction in others. Recently, dramatic adaptation effects on gaze perception were shown, in which the perception of small gaze deviations to the adapted direction is diminished. We compared participants' perceptions of gaze direction before and after adaptation to the left or right gaze, and examined event-related potential correlates of this gaze adaptation. We found a striking impairment in perceiving gaze to the adapted side. Event-related potentials revealed no direction-specific gaze adaptation effects on N170, although small adaptation effects were seen later, approximately 250-350 ms. This suggests that, rather than modulating the gaze processing approximately 170 ms in posterior occipitotemporal areas, adaptation modulates subsequent processes that are possibly mediated by more anterior right-temporal areas.
目光注视是一种重要的社交信号，人类能够准确判断他人的目光方向。最近，研究表明目光感知存在显著的适应效应，即对适应方向的小幅度目光偏差的感知会减弱。我们比较了参与者在适应向左或向右注视前后对目光方向的感知，并研究了这种目光适应的事件相关电位相关性。我们发现，在感知适应侧的目光时存在明显的损伤。事件相关电位显示，在N170上没有方向特异性的目光适应效应，尽管在稍后约250 - 350毫秒时可以看到小的适应效应。这表明，适应并非在枕颞后部区域大约170毫秒时调节目光处理，而是调节可能由更靠前的右侧颞叶区域介导的后续过程。
