Figure 2.

Cortical deactivation fails to affect unisensory integration in a multisensory SC neuron. Within-modal visual tests (Visual 1 + Visual 2) were conducted in the same multisensory neuron depicted in Figure 1. A, In the control condition, the neuron showed no response enhancement and an underlying subadditive computation at all levels of stimulus effectiveness. B, Although cortical deactivation reduced the sensory responses (revealing that some of the sensory drive came from cortex), the underlying subadditive computation showed little change. C, Responses were re-established by cortical reactivation. Conventions are the same as in Figure 1.