The Default Mode Network:
your brain’s “inward” network

The Default Mode Network was discovered when researchers noticed that certain brain regions become more active, not less, at rest, when a person is not doing anything in particular. Hence the name “default mode”: the setting the brain returns to whenever no external task is at hand.

It is not a single spot but a network of cooperating regions. Simplified, it is the network of self-reference: it produces your inner experience, the thread of your life story and the quiet background hum of thought. To see how all six networks interact, read our overview “The six brain networks explained”.

The DMN takes part in some of the most human of mental processes:

• Self-reference – thinking about yourself, your feelings and values.
• Autobiographical memory – retrieving memories and weaving them into a story.
• Daydreaming and imagination – travelling mentally into the past or future.
• Social cognition – putting yourself in someone else’s shoes.

Its core hubs include the medial prefrontal cortex, the posterior cingulate cortex and the precuneus. These regions communicate constantly – but a healthy DMN can also step back when needed, so you can focus outward.

When the DMN falls out of rhythm – too active, insufficiently reined in, or poorly coordinated with other networks – daily life can feel like this:

• Rumination and looping thoughts you cannot switch off.
• Memory gaps or trouble holding the thread.
• Low self-awareness or a sense of “standing beside yourself”, up to dissociation.
• Difficulty focusing outward because attention keeps tipping inward.

Such experiences are not proof of any particular illness. Networks work together, and symptoms almost always arise from an imbalance across several networks. That is why we measure rather than guess.

An overactive or poorly disengaging DMN has been linked in research to several conditions – as one of many pieces of the puzzle, never the sole cause. Examples: the persistent rumination in depression, the fogginess and “brain fog” of Long COVID, and the dissociation and intrusive memories in trauma and PTSD. This helps explain why two people with the same diagnosis can feel entirely different – their network profiles differ.

With us, nothing begins with treatment. It begins with a structured assessment: history, existing findings, questionnaires, clinical and neurological examination, and where needed lab work and imaging. Whether qEEG brain mapping is added, comparing your brain activity against a normative database, is decided after that; with rumination, dissociation and concentration problems it often is. Only this whole picture reveals whether, and how strongly, a network like the DMN is involved, and the program is built on it.

If there is a starting point, neurofeedback can help: a self-regulation training in which you receive real-time feedback on your brain activity and learn to calm overactive patterns. For a first, non-binding impression of your network profile, try the Brain Network Analysis.