Brain Injury & Personality Change: Acquired Personality Disorders

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Phineas Gage was a 25 years old construction foreman who lived in Vermont in the 1860s. While working on a railroad bed, he packed powdered explosives into a hole in the ground, using tamping iron. The powder heated and blew in his face. The tamping iron rebounded and pierced the top of his skull, ravaging the frontal lobes.

In 1868, Harlow, his doctor, reported the changes to his personality following the accident:

He became "fitful, irreverent, indulging at times in the grossest profanity (which was not previously his customs), manifesting but little deference to his fellows, impatient of restraint or advice when it conflicts with his desires, at times pertinaciously obstinate yet capricious and vacillating, devising many plans for future operation which are no sooner arranged than they are abandoned in turn for others appearing more feasible ... His mind was radically changed, so that his friends and acquaintances said he was no longer Gage."

In other words, his brain injury turned him into a psychopathic narcissist.

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