CEREBRAL CORTICAL MECHANISMS FOR EYE MOVEMENTS AND VISUAL ATTENTION

两种不同的调查路线被遵循，以确定大脑如何 皮质及其传出区域控制眼球运动和视觉空间 关注 一种是研究上级丘运动神经元的活动 关于由电刺激引起的眼跳， 额眼野或上级丘，并通过其颞叶进行修改 接近视觉诱发的扫视。在另一组中， 后顶叶皮层进行了研究，使用双步骤任务，以了解如何 当出现不和谐音时， 在刺激的视网膜位置和 获得这种刺激。当猴子的大脑中 进行适当方向的扫视以获得刺激，无论是 并不是说刺激存在于神经元的感受野， 例行固定任务。这种神经元需要视觉刺激的存在， 刺激，这表明在后顶叶皮层，空间 通过视觉地图的坐标变换来保持精度， 而不是通过对目标在空间中的位置进行显式编码。

Two different lines of inquiry were followed to determine how the cerebral cortex and its efferent regions control eye movements and visuospatial attention. In one, activity of movement neurons of the superior colliculus was studied in relation to saccades evoked by electrical stimulation of either the frontal eye field or the superior colliculus and modified by their temporal proximity to visually evoked saccades. In the other, visual neurons in the posterior parietal cortex were studied using double-step tasks to see how this cortex might maintain spatial accuracy when there was a dissonance between the retinal location of a stimulus and the saccade necessary to acquire that stimulus. Neurons in this region discharged when the monkey made a saccade of the proper direction to acquire a stimulus, whether or not that stimulus lay in the neuron's receptive field as studied in a routine fixation task. Such neurons required the presence of a visual stimulus, suggesting that in the posterior parietal cortex, spatial accuracy is maintained by coordinate transformation of a visual map rather than by the explicit coding of target position in space.