Not that we need more reasons to prevent inflicted head injuries, but here's another one anyway

APA Annual Meeting 2008: Consequences of abuse, neglect, and trauma on the development of mental health disorders and the implications for prevention, diagnosis, and treatment.

"Stress early in life is related to persistent sensitization of the pituitary-adrenal and autonomic stress response. Sensitization of the stress response is likely related to an increased risk for adulthood psychopathology.