Did Dr Neumann actually get around to swapping the brain of the guy he kidnaps in House of Frankenstein?
He says he's going to but I'm not sure if he gets around to it.
I always wondered about that too. It seems that whatever brain is placed in the monster's skull eventually adopts the original monster's personality. Didn't they say something in Son about the monster's cells being abnormal? Maybe his genetic code, and even some memories are recorded in each cell.