Neuropsychology Practice Test

Frontal lobe damage can profoundly alter personality and social behavior, showing that this brain region governs impulse control, planning, and how we adapt to social norms. Phineas Gage's case is the iconic example: after a tamping iron blasted through his skull and damaged much of his frontal cortex, observers noted a dramatic shift in temperament—from a reliable, sociable, practical worker to someone impulsive, irritable, and socially inappropriate. This stark transformation helped establish a clear link between the frontal lobes and personality, highlighting the role of areas involved in regulating impulses and social conduct. By contrast, other famous cases like H.M. and Clive Wearing are celebrated for severe amnesia due to temporal lobe damage, not personality changes. So the case best known for personality changes after frontal lobe damage is Phineas Gage.