Figure 11.

Overt sensorimotor responses to the visual stimulus location did not rehabilitate hemianopia. Plotted is the percentage of orientation/approach responses to the visual stimulus location (solid), auditory stimulus location (dashed), as well as the percentage of no overt response (No Go, dotted) during multisensory training trials. Each animal’s data are shown in one row. (Left) (first round of training): Animals F₁ and F₂ (spatial disparity) rapidly learned not to approach the auditory stimulus location (no reward was obtained there), but rather to approach 45° (the visual stimulus location) to obtain a reward—despite being unable to respond to that visual stimulus during visual-only trials. In the case of animal F₃ (temporal disparity), the visual and auditory stimulus locations were the same. This “visuomotor” response did not resolve the hemianopia; responses to visual stimuli did not rise above chance during visual-only trials in any animal. (Right) (second round of training): Arrows indicate when responses to contralesional visual stimuli were first observed in each animal in unisensory testing sessions, and when its hemianopia had resolved at all tested locations.