Modern neuroscience has revealed how stroke affects the brain's structure, chemistry, and function — knowledge that's transforming treatment approaches.
The Brain Regions Involved in Stroke
Key brain areas implicated in stroke include:
- Amygdala: The brain's threat-detection center becomes hyperactive in stroke, triggering excessive fear and stress responses
- Prefrontal Cortex: Responsible for rational thinking and emotional regulation — its function is often impaired by stroke
- Hippocampus: Memory and context processing; chronic stroke can affect its volume and function
- HPA Axis: The stress hormone system that, when dysregulated, drives many physical symptoms of stroke
Neurochemistry of Stroke
Stroke 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 stroke. CBT, for example, has been shown to normalize amygdala reactivity.
Neuroplasticity and Stroke
The brain retains its ability to change throughout life. This neuroplasticity means that with appropriate treatment and practice, the neural patterns underlying stroke can genuinely change.