my brother is 12 years old and was brought up with me by his father. his father treated us both cruely and ignored his behavirol problems as he grew up. when my mother stopped work because of illness she split up with him. growing up my brother was kept in, shouted at over the smallest of things, sworn at, hit and was put down a lot. now he's a very angry child who has outbursts over the smallest of things no boundires and has a low opinion of himself. He punches things when he's angry, he gets irrational fears and will not sleep in the dark. he swears a lot and won't listen to anyone. my mother is really stressed and i just want to help her. is there a term for this behavior? what can i do to help? thank you.