STRUCTURE-FROM-MOTION IN VISUAL CORTEX

该项目的长期目标是对如何 物体或环境的二维和三维结构可以 从受试者的视觉运动中获得。清醒的行为 Money被用作这种视觉处理的模型。以前的研究 (Siegel和Andersen，1988)表明这两个物种有相似的运动 使用由大量数字组成的高度可控刺激的心理物理学 移动点验证非人类灵长类动物作为模型的使用 人类受试者。清醒状态下的电生理记录 猴子将被用来探索更高级别的运动处理。单人 当猴子执行更早的动作时，会记录到神经元 已发表的心理物理任务。录音研究将首先 现象学描述大脑皮层神经元的特性 顶下小叶的视觉区域和“解剖学上的接近” 当大脑皮质呈现来自运动刺激的结构时。这个 我们将检查这些神经元的感受野结构，以便 确定是否可以通过本地接受野来解释该响应 机械装置。我们将对这些神经元的反应进行比较 对于随机网点刺激和具有相同 基本运动变换。最后，两国之间的相互作用 将探索运动刺激和眼睛在轨道中的位置 试图理解运动是如何被用来感知 周围的空间。这项研究与老年人的心理健康有关。 它试图理解传入的视觉是如何 刺激由顶下小叶执行。对…的理解 这种机制对于理解发生的损害是必要的。 在中风和其他大脑损害之后。

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.