People with a low arousal level of their autonomic nervous system may show aggression as a way of seeking stimulation and excitement.

Autonomic Nervous System

A part of the nervous system that controls involuntary actions of the organs, glands, and blood vessels, managing functions such as heart rate, digestion, and respiratory rate.

Aggression

A range of behaviors that can result in both physical and psychological harm to oneself, others, or objects in the environment.

Arousal Level

describes the physiological and psychological state of being awake and reactive to stimuli, varying from low (unstimulated) to high (fully alert).