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

当我们识别物体在空间中的运动时，大脑中整合了物体的运动信息和位置信息。人类大脑中的这一过程还没有得到足够的阐明。由于视动刺激具有视场运动的视觉空间信息，本研究旨在阐明视觉空间运动在脑内的识别过程。为此，我们用功能磁共振检测了视动刺激过程中大脑的活动。视动刺激时，正常人的颞叶上回包括MT和MST区的活动增加。右脑被认为是活动的优势。我们检测了全场视动刺激和窄视野刺激时的脑活动。当全场视动刺激时，MT、MST视野和顶枕区的活动增加。我们预测在视动刺激过程中，大脑中有视觉识别的场外与注意和眼动有关的场的活动会增加。我们通过使用视觉刺激思想来检查功能磁共振，以引起类似于视动刺激引起的眼球运动。后一次刺激时MT、MST区和顶枕区的活动均低于视动刺激时。我们认为，MT和MST区域以及顶枕区与人脑视觉空间运动的识别有关。

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.