Which part of the brain is most affected in individuals with a TBI resulting in personality changes?

The frontal lobe is crucial in regulating behavior, emotional responses, and personality traits. When a traumatic brain injury (TBI) impacts this area, individuals often exhibit significant personality changes, including increased impulsiveness, emotional instability, irritability, and difficulty with problem-solving and decision-making.

This part of the brain plays a central role in the higher cognitive functions that shape personality and social behavior. Damage here alters an individual’s ability to control impulses and process social interactions, leading to observable changes in how they engage with others and perceive themselves.

The other lobes, while important for various functions such as visual processing (occipital lobe), auditory processing (temporal lobe), and sensory integration (parietal lobe), are less directly linked to personality. Changes in personality following a TBI are primarily associated with disruptions in the functioning of the frontal lobe, making it the area most affected in these cases.