I heard a talk by Vincent Hayward on the sense of touch as a multi-modal system, where he claimed that the brain power devoted to haptics is at least as big as the one devoted to vision. I have found some answers with respect to vision, which claim the percentage to be between 25%-33% of the neo-cortex. The cortical homunculus shows a sensory map of the body, where I guess the eye depicted is more related to the haptic part of the eye region, rather than the vision.Can you confirm the percentage for vision? What is the percentage for haptics? Quotable sources would be fantastic of-course, but just a rough number would also do. I am mostly interested in the rough relative relation between the two modalities.
What is the brain power devoted to vision and haptics?
neurobiology;vision;sensation