Primary sensory cortices are generally thought to be devoted to one sensory modality - vision, hearing, or touch, for example. Surprising interactions between these censory modes have recently been reported. One example demonstrates that people with cochlear implants show increased activity in visual cortex when listening to speech; this may be related to enhanced lipreading ability.
Zatorre, R. J. (2001). Do you see what i’m saying? Interactions between auditory and visual cortices in cochlear implant users. Neuron. Cell Press. https://doi.org/10.1016/S0896-6273(01)00347-6