I have read in some websites that the percentage of the cortex devoted to processing visual information is from 30-66% with some claiming even 90%. And compared to that, only about 3% is dedicated to hearing.
Is this true?
The only source I've found stating something similar is from Sells & Fixott (1957) where 50% of the neural tissue is devoted to vision and almost two-thirds of the electrical activity of the brain is devoted to vision when the eyes are open.
I haven't found anything related to hearing though. Does anyone know of a paper where this is discussed?
Sells, S.B. & Fixott, R. S. (1957). Evaluation of Research on Effects of Visual Training on Visual Functions. American Journal of Ophthalmology 44(2), 230—236