Neurons at the boundaries of sensory areas are cross-modal
Via in vivo electrophysiology combined with sensory stimuli, Mark T. Wallace , Ramnarayan Ramachandran and Barry E. Stein found that
“at the borders between each of these domains [visual, auditory, and somatosensory cortex] a concentration of multisensory neurons was found whose modality profile matched the representations in neighboring cortices and that were able to integrate their cross-modal inputs…”