Physical surely helps but the theory of cognitive reserve suggests heavy brain use may build up a reserve of extra connections which insulate one somewhat from

Physical surely helps but the theory of cognitive reserve suggests heavy brain use may build up a reserve of extra connections which insulate one somewhat from brain loss. I can't quote selectively as it's a big chunk of text, but here <https://en.wikipedia.org/wiki/Cognitive_reserve https://en.wikipedia.org/wiki/Cognitive_reserve>