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Study on the cerebral activity for the visual recognition of the spatial movement by functional MRI

功能性MRI研究空间运动视觉识别的大脑活动

基本信息

批准号：
12671658
负责人：
MIZUTA Keisuke
金额：
$ 0.96万
依托单位：
Gifu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2000
资助国家：
日本
起止时间：
2000 至 2001
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-12671658/
关键词：
functional MRI cerebral activity visual stimulation spatial recognition dynamic recognition Functional MRI

项目摘要

The information of the movement and the position of the object are integrated in the brain when we recognize the movement of the object in the space. The process in the human brain has been not enough elucidated. Because the optokinetic stimulation had the visual spatial information of the movement of the field, we aimed to elucidate the processes of the recognition of the visual spatial movement in the brain. For this aim, we examined the activities of the brain during optokinetic stimulation by functional MRI. During optokinetic stimulation, the increase of the activities of the superior temporal gyrus Including the MT and MST field in normal subjects. The domination of the activity was admitted in the right hemisphere. We examined the activities of the brain during the full field optokinetic stimulation and narrow field stimulation. When the full field optokinetic stimulation, the activities of the MT and MST field, and parieto-ccipital area increased. We forecast the Increase of the activities of the field concerning with the attention and the eye movement beside the field with visual recognition in the brain during the optokinetic stimulation. We examined functional MRI by the use of the visual stimulation thought to cause the similar eye movement by which the optokinetic stimulation is caused. The activities of the MT and MST field, and parieto-ccipital area during the latter stimulation were less than those during the optokinetic stimulation. We suppose that the MT and MST field, and parieto-ccipital area concern the recognition of the visual spatial movement in the human brain.

当我们认识到物体在空间中的运动时，物体的运动和位置信息在大脑中被整合。人类大脑中的过程还没有得到充分的阐明。由于视动刺激具有视野运动的视觉空间信息，因此本研究旨在阐明视觉空间运动在脑中的识别过程。为此，我们研究了视动刺激过程中的大脑活动的功能磁共振成像。在视动刺激时，正常人的上级颞回包括MT和MST区的活动增加。右脑承认活动占主导地位。我们检测了全视野视动刺激和窄视野刺激时的脑活动。当全视野视动刺激时，MT和MST区以及顶枕区的活动增加。我们预测了视动刺激时大脑中与注意有关的视野活动的增加和与视觉识别有关的视野旁的眼动。我们通过使用视觉刺激来检查功能性MRI，该视觉刺激被认为引起与视动刺激引起的眼球运动相似的眼球运动。后一刺激时MT、MST野和顶枕区的活动均小于视动刺激时。我们认为，MT和MST场以及顶枕区与人脑对视觉空间运动的识别有关。