Modern neuroscience has revealed how traumatic brain injury affects the brain's structure, chemistry, and function — knowledge that's transforming treatment approaches.
The Brain Regions Involved in Traumatic Brain Injury
Key brain areas implicated in traumatic brain injury include:
- Amygdala: The brain's threat-detection center becomes hyperactive in traumatic brain injury, triggering excessive fear and stress responses
- Prefrontal Cortex: Responsible for rational thinking and emotional regulation — its function is often impaired by traumatic brain injury
- Hippocampus: Memory and context processing; chronic traumatic brain injury can affect its volume and function
- HPA Axis: The stress hormone system that, when dysregulated, drives many physical symptoms of traumatic brain injury
Neurochemistry of Traumatic Brain Injury
Traumatic Brain Injury involves imbalances or dysregulation of key neurotransmitters including serotonin, dopamine, norepinephrine, and GABA — all targets of current treatments.
How Treatment Changes the Brain
Both therapy and medication produce measurable changes in brain function in traumatic brain injury. CBT, for example, has been shown to normalize amygdala reactivity.
Neuroplasticity and Traumatic Brain Injury
The brain retains its ability to change throughout life. This neuroplasticity means that with appropriate treatment and practice, the neural patterns underlying traumatic brain injury can genuinely change.