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

当我们在空间中识别物体的运动时，物体的运动信息和物体的位置在大脑中被整合。人类大脑中的这个过程还没有得到充分的阐明。由于光动力刺激具有视场运动的视觉空间信息，我们旨在阐明大脑对视觉空间运动的识别过程。为此，我们用功能性核磁共振检查了光动力刺激时大脑的活动。在光动力刺激下，正常受试者的颞上回活动增加，包括颞下回和颞下回。大脑右半球承认这种活动占主导地位。观察了全视场光动力刺激和窄视场光动力刺激下的脑活动。在全视场光动力刺激下，脑后颞叶和颞叶皮层以及顶枕区活动增加。我们预测在光动力刺激过程中，与注意力有关的场的活动和与视觉识别有关的场旁边的眼动在大脑中增加。我们通过使用视觉刺激来检查功能性核磁共振成像，这种视觉刺激被认为引起了类似的眼动，而眼动是由光动力刺激引起的。后一种刺激下颞叶、颞叶、顶枕区的活动明显低于光动力刺激。我们认为脑后皮层和脑后皮层以及顶枕区与人类大脑对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.