Figure 7.

The intention to make a saccade rarely modulates the visual response of PI neurons in the ascending path. A, Similar visual response of an example relay neuron to the same physical stimulus during the passive fixation task (solid line) and the visually-guided saccade task (dotted line). B, Increased visual response of an example PI neuron that received input from the SC. C, Decreased visual response of an example PI neuron that projected to MT. D, Average visual responses for the visually-guided saccade task (y-axis) are plotted against those for the fixation task (x-axis) for the sample of ascending-path PI neurons. E, Average visual responses for the sample of superficial SC neurons (same conventions as in D). F, Increased visual response of an example superficial SC neuron to the stimulus during the saccade task compared with the fixation task.