Patzwahl D R, Zanker J M, Altenmüller E O
Neurologische Universitätsklinik Hoppe-Seyler, Tübingen, Germany.
Neuroreport. 1993 Apr;4(4):379-82. doi: 10.1097/00001756-199304000-00009.
In the monkey, cortical areas can be localized which are specific for the processing of form, colour, or motion, and it is expected that the human visual cortex is organized in a similar way. The recording of scalp potentials generated by neural activity of underlying cortical areas is a non-invasive method which can be used to study the functional organization of the visual cortex with a high temporal resolution. In the present study we recorded slow cortical potentials from normal subjects to investigate how motion stimuli of variable complexity are processed in human visual cortex. The results show that the pattern of cortical activation is dependent on the type of stimulus. When random dots were moving within the entire stimulus field, or during counterphase flicker, maximal activation occurred over occipital electrode sites. During object motion a pronounced activation is recorded at parietal locations, with the direction of object motion being reflected by the time course of this activation.
在猴子身上，可以定位出专门处理形状、颜色或运动的皮层区域，并且预计人类视觉皮层也是以类似方式组织的。记录由皮层下区域的神经活动产生的头皮电位是一种非侵入性方法，可用于以高时间分辨率研究视觉皮层的功能组织。在本研究中，我们记录了正常受试者的慢皮层电位，以研究人类视觉皮层如何处理不同复杂程度的运动刺激。结果表明，皮层激活模式取决于刺激类型。当随机点在整个刺激区域内移动时，或在反相闪烁期间，枕叶电极部位出现最大激活。在物体运动期间，顶叶部位记录到明显的激活，物体运动方向由这种激活的时间进程反映出来。
