The Default Mode Network and Self-Referential Thought
The brain network most active when we are thinking about ourselves - and why its activity matters in depression and ketamine therapy.
This page has been written and edited by the publisher. It has not been reviewed by a licensed clinician.
- • The DMN underlies rumination and self-narrative.
- • Ketamine and other rapid-acting interventions transiently reduce DMN connectivity.
- • The opening is an opportunity for reflection, not a cure by itself.
What it is
The default mode network (DMN) is a set of brain regions - medial prefrontal cortex, posterior cingulate, precuneus, angular gyrus - that activate when we are not focused on the external world. It mediates self-referential thinking, autobiographical memory, and mind-wandering.
DMN and depression
Hyperactivity and rigid connectivity of the DMN are associated with rumination and depressive cognition. Many therapeutic interventions transiently quiet the DMN.
DMN and ketamine
At sub-anesthetic doses, ketamine reduces DMN connectivity in functional imaging studies. Patients often describe a corresponding softening of the felt sense of self.
Practical implication
Quieting the DMN may create space to step out of habitual self-narratives. The therapeutic work is to use that space, not just experience it.
Educational only. Not medical advice. Discuss treatment decisions with a qualified clinician.
Publisher and editor of Ketalux, based in Chicago, Illinois. Ira is a ketamine therapy patient, not a clinician. This is editorial review, not medical review: Ira is not a licensed clinician and does not provide diagnosis or medical care. Ketalux does not accept compensation from providers in exchange for favorable editorial coverage, evidence ratings, recommendations, patient referrals, or organic provider ranking. Read the full publisher disclosure →
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.