Dark Medical Ninjutsu: Insanity

Amatsu forms handseals, then rushes forward and places his hand on his opponent's head and effects the opponent's brain. The target is then made insane and can either render the opponent harmless or extremely dangerous to themselves and their allies. It is similar to a genjutsu in the fact that's it effects the chakra flow to the brain but it more serious because it also it directly injures the brain.