Chronic traumatic encephalopathy

Also called CTE, Punch-drunk syndrome, or Dementia pugilistica

Chronic traumatic encephalopathy is a brain condition thought to be caused by repeated blows to the head, such as in boxing, rugby, American football or football heading. Symptoms usually appear years after the injuries and can include problems with memory, thinking, mood and behaviour. It gets worse over time.

Last updated Nov 9, 2026

What it is

At present it can only be confirmed by examining the brain after death. During life, doctors assess symptoms and rule out other causes.

There is no cure. Treatment focuses on managing symptoms, such as depression or memory problems, and support for the person and their family. Reducing head impacts in sport helps prevent it.

Common signs

  • Memory loss and confusion
  • Difficulty concentrating or planning
  • Mood changes, depression or irritability
  • Impulsive or aggressive behaviour
  • Problems with speech and movement later on

How it is usually diagnosed

  • Assessment by a neurologist or memory clinic
  • Brain scans to rule out other causes
  • Memory and thinking tests

Records worth keeping

Keeping these together makes each appointment easier, especially when you see a new doctor:

  • A history of head injuries and concussions, with dates
  • Neurology and memory clinic letters
  • Brain scan reports
  • Memory test results over time

Questions to ask your doctor

  • Could my symptoms be caused by something treatable?
  • What support is available for me and my family?
  • Should I stop playing contact sport?

When to get help right away

Call 112 or go to the nearest emergency department if you have:

  • Thoughts of suicide or self-harm: call 112
  • After a head injury: drowsiness, repeated vomiting, a seizure or worsening headache: call 112

This page is general information. It is not a diagnosis and does not replace a doctor who knows your history. Medfold keeps your records organised; it does not interpret them.

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