CEREBRAL CORTICAL MECHANISMS FOR EYE MOVEMENTS AND VISUAL ATTENTION

研究人员进行了两条研究路线，以确定大脑皮层是如何 其传出区控制眼球运动和视觉空间 关注 其中之一是对人类额叶进行局部经颅磁刺激 场活动可以对扫视眼球运动的产生产生影响。 取决于外源性刺激与持续刺激的关系， 在扫视启动的过程中，这种刺激可以促进或 干扰扫视产生。 另一种是采用单神经元记录的方法来探讨其机制 由此猴子的顶叶皮层获得空间准确性。 双步骤任务中的神经元行为完全由 在一个单步任务中的precaccadic和predicted-shift活动。 的 顶叶神经元的活动与它们指定的 特定幅度和方向的视觉注意转移。

Two lines of inquiry were followed to determine how the cerebral cortex and its efferent regions control eye movements and visuospatial attention. In one, focal transcranial magnetic stimulation of the human frontal eye field activity can have on the generation of saccadic eye movements. Depending on the relationship of the exogenous stimulation to the ongoing processes of saccade initiation, such stimulation can facilitate or interfere with saccade generation. In the other, single neuron recording was used to probe the mechanisms whereby the parietal cortex of the monkey achieves spatial accuracy. Neuronal behavior in a double-step task is entirely predicted by presaccadic and predictive-shift activity in a single-step task. The activity of parietal neurons is most consistent with their specifying a shift of visual attention of particular amplitude and direction.