Figure 1. Recording site and reaching task. A, Brain location of recording site. Part of the occipital pole and inferior parietal lobule has been cut away to show the location of the recording site (area V6A, gray shaded) in the anterior bank of the parieto-occipital sulcus. Locations of other parietal and frontal areas are also indicated. B, Experimental setup. Reaching movements were performed in the light and in the dark (gray shaded) background, from a home button (black rectangle) toward one of three targets located on a panel in front of the animal. C, Time course of the task. The sequence of status of the home button (HB), target button (TB) and color of the target button (LED) are shown. Lower and upper limits of the time intervals of each epoch are indicated above the scheme. Below the scheme, typical examples of eye traces during a single trial is shown. D, Time epochs during a typical trial. Short vertical ticks are the sequence of spikes collected from a neuron. Long vertical ticks among spikes indicate the occurrence of behavioral- or task-related events. From left to right, the markers indicate: trial start (HB press), target appearance (LED lit-on green), go signal for outward movement (LED red), start and end of outward reach movements (HB release and TB press, respectively), go signal for inward movement (LED switching off), start and end of the inward movement (TB release and HB press, respectively), end of data acquisition. The time epochs are indicated below the raster of spikes and markers.