Actually there are no sensors in the brain, so the closest I can come is the forehead, back of the head, etc
I get tingling sensations in my forehead which make me think that my brain is like cheese. Furthermore I believe I have brain damage so I imagine it as Swiss cheese such as Emmental, full of holes.
This is a pretty negative self image to be carrying around with me. So I will dispense with it. When I feel my forehead tingling I will think of Cheddar cheese without the holes.
Also I don’t have any evidence to suggest I would be brain damaged. No stories about my birth. Nothing showed up on the brain scan they did when I was in mental hospital. So I should accept the likelihood that this is all just a mental health issue and is therefore fixable. Woohoo!