It depends what type of abuse you're talking about. If it is parental abuse, then it could be caused by anger issues, or if your child isn't listening, the parent would normally try hitting their child, or saying things that could scar their child.
and normally, if a child is abused, there is a possibility of them becoming an abuser as well. If that isn't the case, they'll most likely grow up with PTSD and is afraid of relationships, and afraid of being hit.
I think the answer is the pituitary.
Answer:
The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control of the body and communication among its parts.
