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