pugilistic parkinsonism

Pugilistic parkinsonism, also known as dementia pugilistica or punch-drunk syndrome, is a chronic traumatic brain injury resulting from repeated blows to the head, commonly seen in boxers. This condition is characterized by progressive neurological deterioration, including memory loss, concentration deficits, confusion, behavioral changes, and motor impairments like parkinsonism.12

The pathology involves atrophy of the frontal and temporal lobes and the accumulation of tau protein in neurofibrillary tangles. It stems from the degeneration of neurons in the substantia nigra, which produce dopamine, disrupting motor control. Symptoms can include tremors, rigidity, difficulty initiating movement, and dementia. While CTE can only be definitively diagnosed postmortem, symptoms often appear in midlife, years after the initial head trauma.234