A son brings his father to the clinic and tells the nurse that his father has begun to act strangely ...

Ans: C
Asking about injury to the brain would be most appropriate, because the limbic system and cerebral cortex are brain structures most frequently associated with aggressive behavior. Clients with a history of damage to the cerebral cortex are more likely to exhibit increased impulsivity, decreased inhibition, and decreased judgment than are those who have not experienced such damage. Schizophrenia and substance abuse are also associated with violent behavior. Asking about previous problems with anger would be important to know but would not be the priority. Additionally, the son states that the father has never done this before. Injury to the back of the head or neck is not associated with aggression.