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