STRUCTURE-FROM-MOTION IN VISUAL CORTEX

该项目的长期目标是一个完整的描述如何 物体或环境的二维和三维结构可以 可以从人类受试者的视觉运动中获得。清醒的行为 猴子被用作这种视觉处理的模型。以前的研究 （Siegel和Andersen，1988）表明两种物种具有相似的运动 心理物理学使用由大量数字组成的高度受控的刺激 移动的点验证使用非人类灵长类动物作为模型， 人类实验对象清醒状态下行为的电生理记录 Monkey将用于探索更高级别的运动处理。单个 神经元将被记录，而猴子是执行较早的 发表的心理物理任务。录音研究将首先 从现象学上描述了大脑皮层神经元的特性 顶下小叶的视觉区域和“解剖学上接近” 当运动刺激的结构出现时，的 将检查这些神经元的感受野结构， 确定反应是否可以由局部感受野解释 机制等将比较神经元的反应 随机点刺激和具有相同的运动的酒吧 潜在的运动变换最后， 将探索运动刺激和眼睛在眼眶中的位置 为了理解运动是如何被用于感知 周围的空间。这项研究是关于心理健康的， 个人，因为它试图了解如何是传入的视觉 刺激由顶下小叶执行。的理解 这种机制对于理解发生的损害是必要的， 中风和其他脑损伤

The long term objective of the project is a complete description of how the two and three-dimensional structure of objects or the environment can be obtained from visual motion in human subjects. The awake behaving monkey is used as a model for such visual processing. Previous studies (Siegel and Andersen, 1988) indicate both species have similar motion psychophysics using highly controlled stimuli consisting of large numbers of moving dots validating the use of the non-human primate as a model for human subjects. Electrophysiological recordings in the awake behaving monkey will be used to explore higher level motion processing. Single neurons will be recorded while the monkey is performing the earlier published psychophysical tasks. The recording study will first phenomenologically describe the properties of neurons in the cortical visual areas of the inferior parietal lobule and "anatomically near" cortex when presented with the structure from motion stimulus. The receptive field structures of these neurons will be examined in order to determine if the response may be explained by local receptive field mechanisms. A comparison will be made between the response of the neurons to the random dot stimuli and to the movement of bars which have the same underlying motion transformation. Finally, the interactions between the motion stimulus and the position of the eye in the orbit will be explored in an attempt to understand how motion is used in the perception of surrounding space. This study is related to the mental health of individuals in that it seeks to understand how is of incoming visual stimuli is performed by the inferior parietal lobule. The understanding of such mechanisms is necessary in understanding the damage that occurs following stroke and other cerebral compromise.