your brain is useless if you cant smell, hear, see, taste or feel. Imagine if you were born with no senses what so ever, then you wouldnt even have a concouis or anything because your concouis is the brains interpetation of sensories. Just need to get that approved to take a baby and tear its eyes out and rip out its tung, cut the nose off and give it pain killers. Then we can really find out what happens when a human does not even have any senses at all