About traumatic brain injury

Traumatic Brain Injury (TBI) is an injury to the brain caused by a trauma. There are many possible causes, including road traffic accidents, assaults, falls and accidents at home or at work.

This section gives an overview of traumatic brain injury. You can read a description of the pages in this section below, and use the links on the left to visit those that interest you.

In this section

• What happens in a TBI - Explains the different injuries and events that can cause damage to the brain.
• Injury severity - Brain injury is often categorised as minor, moderate or severe. This page explains how this is assessed by the medical team, and the issues which can arise.
• Minor brain injury / minor head injury
• Moderate brain injury
• Severe brain injury
• Coma and persistent vegetative state - Unconsciousness follows traumatic brain injury, whether for a few seconds or for a few weeks, and is the most typical symptom of a head injury.