STRUCTURE-FROM-MOTION IN VISUAL CORTEX

视觉皮层的运动结构

• 批准号: 2019783
• 负责人: RALPH M SIEGEL
• 金额: $ 11.8万
• 依托单位: RUTGERS THE STATE UNIV OF NJ NEWARK
• 依托单位国家: 美国
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-09-30 至 1998-09-29
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2019783
• 关键词: Macaca mulatta; biological models; form /pattern perception; motion perception; neural information processing; visual cortex; visual stimulus

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.

该项目的长期目标是完整描述如何 物体或环境的二维和三维结构可以 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。之前的研究 （Siegel 和 Andersen，1988）表明两个物种具有相似的运动 使用由大量组成的高度受控刺激的心理物理学 移动点验证了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层次的运动处理。单身的 当猴子执行较早的动作时，神经元将被记录 发表心理物理学任务。录音研究首先 从现象学角度描述皮质神经元的特性 顶下小叶的视觉区域和“解剖学上接近” 当皮层受到运动刺激的结构呈现时。这 将检查这些神经元的感受野结构，以便 确定响应是否可以用局部感受野来解释 机制。将在神经元的反应之间进行比较 随机点刺激和具有相同的条的移动 底层运动变换。最后，两者之间的相互作用 将探索运动刺激和眼睛在眼眶中的位置 试图理解运动是如何用于感知的 周围空间。这项研究与心理健康有关 个人，因为它试图了解传入的视觉效果如何 刺激是由顶下小叶进行的。的理解 这种机制对于理解所发生的损害是必要的 中风和其他脑损伤后。