Inside the battered brain

Chronic Traumatic Encephalopathy (CTE) is a brain disease affecting mood, behavior, and cognition. Historically identified in boxers, it is now recognized in athletes and military veterans. CTE is linked to repeated head trauma and concussions. It causes tau protein deposits in the brain, affecting areas like the frontal and temporal lobes, hippocampus, and amygdala. Symptoms, including speech and movement difficulties, appear years after injury and worsen over time, leading to dementia. Currently, CTE can only be diagnosed posthumously through brain examination.

What is the relationship between CTE and head trauma?

Why is it currently impossible to diagnose CTE in a living person?