Brain Connectivity: Networks, Not Regions
Modern neuroscience emphasizes how brain regions communicate over how isolated regions function — and why this reframes mental health.
- • Mental function is networked, not regional.
- • Mental illness often involves network coordination problems.
- • Many effective treatments rebalance network activity.
From regions to networks
The functional brain is organized into networks: the default mode network, salience network, executive control network, and others. Healthy function depends on flexible coordination between them.
Connectivity and mental health
Depression, anxiety, and trauma are associated with characteristic alterations in network coordination — often rigidity or imbalance rather than damage to specific regions.
Ketamine effects
Imaging studies show ketamine acutely alters connectivity patterns, often reducing default-mode dominance and shifting global signal organization.
Educational only. Not medical advice. Discuss treatment decisions with a qualified clinician.
Independent publisher and editor of Ketalux, based in Chicago, Illinois. Ira commissions, edits, and reviews every article on the site and believes ketamine therapy — used responsibly — offers real hope for people living with depression, anxiety, PTSD, and chronic pain. Contact: ira@idigits.com.
Educational use only. The content on this page is provided for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Ketamine and related therapies carry risks and are appropriate only under qualified medical supervision. Always consult a licensed healthcare professional about your individual situation. Information may change as research evolves.