The Default Mode Network: Why the Brain Keeps Returning to the Familiar

One of the most fascinating things about the brain is that it never really switches off.

Even when we are sitting quietly, staring out of a window, taking a shower, or supposedly doing absolutely nothing, the brain remains remarkably active. In fact, some regions become more active when our attention is no longer focused on the outside world.

Together, these regions form the Default Mode Network, or DMN.

It is the network associated with wandering thoughts, memories, imagined conversations, reflections about ourselves and predictions about what might happen next. It becomes particularly active when the mind turns inward.

In other words, when nothing in particular is happening, the brain often starts telling us A STORY.

And very often, that story is about us. And very often, it’s not a pleasant one.

Left to wander, the mind has a striking tendency to revisit worries, regrets, perceived mistakes and imagined future problems, particularly during periods of stress or uncertainty.

The Brain at Rest

The Default Mode Network is not a single part of the brain, but a collection of interconnected regions that tend to become active together when we are not concentrating on a specific external task.

Among them are the medial prefrontal cortex, involved in thinking about ourselves and evaluating information in relation to us, and the posterior cingulate cortex and precuneus, which play important roles in autobiographical memory and self-referential processing. Other regions contribute to memory, imagination, social understanding and our ability to construct meaning from experience.

When our attention is directed towards solving a problem, reading carefully or responding to something happening around us, activity in the DMN generally decreases.

But when the mind is allowed to drift, it becomes more active again.

This is why we can be driving a familiar route and suddenly realise that we have spent the last ten minutes replaying a conversation from three days ago… or, sometimes, one from years ago that our brain has apparently decided is still worth revisiting.

The brain, apparently, has an agenda of its own.

One of the most interesting aspects of the Default Mode Network is its involvement in OUR SENSE OF PERSONAL IDENTITY.

Our brains are constantly drawing upon previous experiences to create a coherent understanding of who we are.

Many of these conclusions are not deliberate beliefs that we consciously choose. They develop gradually through repeated experiences, relationships, emotional learning and the meaning we have given to what has happened to us.

From the brain's perspective, this is extremely useful.

Rather than approaching every moment as completely new, it can use previous experience to anticipate what is likely to happen next. The brain is, among many other things, a prediction-making organ.

And prediction makes us efficient.

BUT WHAT IS FAMILIAR IS NOT NECESSARILY WHAT IS TRUE.

When the Past Shapes the Present

If we have frequently experienced criticism, we may become particularly alert to signs of disapproval. If we have learned that achievement brings recognition, we may continue striving long after achievement itself has stopped feeling meaningful. And if we have become accustomed to unpredictability, we may find calm surprisingly uncomfortable.

In each case, the past quietly shapes what our brain notices, anticipates and prepares for.

Consciously, we may know that our circumstances have changed.

But deeper patterns do not always update at the same pace.

This helps explain something I often encounter in therapeutic work: people can understand intellectually that an old belief is no longer true and yet continue TO FEEL AND REACT as though it were.

We know they are safe, but our body remains vigilant. We know they do not need everyone's approval, yet criticism still feels disproportionately threatening. We know we are successful, but some part of us continues to behave as though we still have something to prove.

The brain is not simply responding to what is happening now.

It is interpreting the present through what it has learned from the past.

The Default Mode Network also offers an interesting perspective on why certain patterns of thinking can become so persistent.

The brain becomes more EFFICIENT at what it repeatedly does. Neural pathways that are activated again and again become easier to access, particularly when those thoughts are connected with strong emotions or important experiences.

If the mind constantly returns to worry, self-criticism, regret or imagined future scenarios, these patterns can become deeply familiar. The DMN is part of the neural architecture through which autobiographical memories and our internal narratives are revisited over and over again.

And this is one reason why simply telling ourselves to stop thinking about something rarely works.

The brain tends to follow the pathways it knows best.

Meditation and Mental Flexibility

This is where meditation can become an amazing tool.

Brain-imaging research has found changes in the activity and connectivity of the Default Mode Network associated with meditation practice, particularly in the way regions involved in attention and internally focused thought interact.

During many forms of meditation, we practise noticing when the mind has wandered and gently bringing our attention back to something else: the breath, bodily sensations, sound, awareness itself, or another chosen focus.

It can seem almost insignificant.

A thought appears. We notice it.

And rather than automatically following it into a ten-minute internal documentary about everything that might go wrong next Tuesday, we return our attention to the present moment.

But this small act is CRUCIAL. We are beginning to experience a thought without automatically becoming absorbed in it.

Over time, meditation may help develop greater flexibility between brain networks involved in thoughts, attention and present-moment awareness.

The aim is not to silence the Default Mode Network. It plays an important role in memory, imagination, creativity, reflection and our ability to understand ourselves and other people.

What matters is OUR ABILITY TO SHIFT, to step out of habitual mental activity and reconnect with what is actually happening in the present moment.

Perhaps one of the most powerful consequences of repetition is that familiar patterns can eventually begin to feel like IDENTITY.

I am anxious. I am someone who needs control. I don't cope well with uncertainty. I have always been this way.

These statements can feel like descriptions of something permanent.

But often, what we experience as who I am is partly what the brain has learned to expect, rehearse and repeat.

That distinction is really important. Because learned patterns can change.

The brain remains capable of modifying its connections and patterns of activity throughout life. This capacity, known as neuroplasticity, means that experience continues to shape the brain long after childhood.

But change rarely happens because we have understood something once.

It happens through repeated experiences that gradually give the brain different information.

Psychotherapy can provide some of those experiences. So can meditation, emotional processing, nervous system regulation, relationships and the gradual practice of responding differently in situations that once triggered familiar reactions.

Each time something different happens, the brain receives a little more evidence that its old prediction is NOT the only possible outcome.

And perhaps this is where understanding the Default Mode Network becomes particularly useful.

It gives us another way of looking at the thoughts and reactions that seem to arise so automatically. Instead of treating them as definitive statements about who we are, we can begin to recognise them as part of an extraordinarily sophisticated brain doing what it has learned to do: using the past to anticipate the future.

Sometimes it gets it right.

Sometimes the past simply becomes its best guess for what comes next.

But THE BRAIN’S PREDICTION DOES NOT HAVE TO BECOME OUR REALITY.

A familiar thought can still appear without becoming a conclusion. An old reaction can still be triggered without determining what happens next. The past remains part of us, but it does not have to provide the blueprint for every experience that follows.

Perhaps change begins there — in the small but significant space between what the brain expects and what we choose to experience next.

Why We Get Stuck in Survival Mode

There are moments in life when we find ourselves reacting in ways that seem difficult to understand. Our reactions seem completely disproportionate to a situation.

A delayed reply to a message creates a surprising amount of anxiety. A relatively minor disagreement stays with us for days. We finally have an afternoon to rest — something we have been saying we desperately need — and within twenty minutes we are checking emails, reorganising a cupboard, or wondering whether we have forgotten something important.

We may tell ourselves that we are overthinking, being too sensitive, or simply not very good at relaxing.

But our reactions often make much more sense when we stop looking at them purely through the lens of our thoughts and begin considering WHAT IS HAPPENING IN THE NERVOUS SYSTEM.

Instead of asking “Why am I like this?”, it can be far more interesting to ask:

“What has my nervous system learned to expect?”

The Nervous System Has a Different Set of Priorities

The nervous system is not particularly concerned with whether we are fulfilled, confident or living our best life.

Its priorities are rather more basic: Its job is to keep us ALIVE.

From the beginning of our lives, the brain is constantly gathering information about the environment around us. It notices what feels safe, what feels unpredictable, what brings connection and what might lead to rejection, conflict or danger.

Much of this happens outside conscious awareness.

Gradually, these experiences create an internal map of the world — and the nervous system uses that map to anticipate what might happen next.

This is an extraordinarily useful ability. We would not want to have to carefully analyse whether an approaching car represents a danger before moving out of its way.

The problem is that the nervous system is not always very good at distinguishing between what was dangerous and what is dangerous now. Nor does it always distinguish between an actual threat and a perceived one.

The body can activate many of the same protective responses whether we are facing genuine physical danger or simply anticipating something our brain interprets as threatening — speaking in public, having a difficult conversation, being evaluated or facing the possibility of being wrong.

The threat may be emotional rather than physical, but the nervous system can still respond as though something serious is at stake.

And once it has learned that vigilance is useful, it can become reluctant to give it up.

Survival mode describes a state in which the nervous system remains oriented towards detecting and responding to potential threat, even when no immediate danger is present.

When Being Prepared Becomes a Way of Life

SURVIVAL MODE is often associated with dramatic experiences, but it does not always begin with a single traumatic event.

Sometimes it develops gradually.

Years of emotional unpredictability, responsibility, pressure, conflict or simply having to cope with too much for too long can teach the nervous system that staying alert is a sensible strategy.

And because human beings are very adaptable, we adapt.

We become organised. Responsible. Independent. Good at anticipating problems. We notice subtle changes in other people’s moods. We think ahead. We make sure things are taken care of.

From the outside, this can look highly functional. Often, it even looks like success.

The problem is that the BODY MAY BE PAYING A PRICE FOR MAINTAINING THAT STATE OF CONSTANT ALERTNESS.

Even when nothing is obviously wrong, a subtle sense of tension can remain in the background. The mind continues running through possibilities long after the working day has ended. Silence feels slightly uncomfortable. Rest feels unproductive. And when life finally slows down, the nervous system may not immediately know what to do with the stillness.

After all, familiarity and safety are not always the same thing.

One of the reasons survival patterns can be difficult to recognise is that they do not necessarily feel like anxiety. It may look like perfectionism, people-pleasing, or it may involve staying constantly busy, avoiding conflict, controlling every detail, disconnecting from emotions or finding it almost impossible to ask for help.

These behaviours can easily become part of our IDENTITY.

But underneath some of these familiar characteristics there may be an older strategy — one that once helped create a sense of predictability, control or safety.

This does not mean that every personality trait needs to be analysed or turned into a psychological problem. Sometimes being organised really does just mean you like being organised.

But when a pattern feels compulsive rather than chosen — when not doing it creates discomfort — it can be worth becoming curious about what the nervous system may be trying to prevent.

This is perhaps one of the stranger aspects of nervous system regulation.

We tend to assume that if stress is uncomfortable, calm should automatically feel wonderful.

But the nervous system often prefers what is familiar to what is objectively better.

If the body has spent years operating with a certain level of tension, vigilance or urgency, slowing down can initially feel unsettling rather than soothing.

This is why someone can genuinely want more peace in their life and then unconsciously recreate pressure the moment things become quiet.

It is also why being told to “just relax” is rarely the life-changing intervention people imagine it to be.

The body cannot simply be instructed into safety.

It has to experience it.

From Protection to Flexibility

The aim of therapeutic work is therefore not to eliminate the nervous system's protective responses.

We need them.

Our autonomic nervous system is constantly adjusting to what is happening around us. The sympathetic nervous system helps mobilise the body when action is required — increasing alertness and preparing us to respond — while the parasympathetic nervous system supports processes associated with rest, recovery and restoration.

Neither is inherently good or bad. We need the ability to move between them.

A healthy, regulated nervous system is not one that remains permanently relaxed. It is one that can respond appropriately to what is happening and, importantly, return towards a state of homeostasis once the challenge has passed.

We can mobilise when something requires our attention, respond when there is genuine difficulty, and then gradually settle again.

For many people who have spent years in a state of heightened alertness, IT IS NOT THE ACTIVATION ITSELF THAT IS THE PROBLEM. IT IS THE DIFFICULTY COMING BACK DOWN.

Psychotherapy can help us understand where these patterns began, but it can also offer something equally important: the opportunity to experience ourselves differently.

Within a safe and attuned therapeutic relationship, we can begin noticing what happens internally when we feel uncertain, criticised, vulnerable, out of control or simply still.

Rather than immediately trying to get rid of these reactions, we become curious about them.

Alongside psychotherapy, there are many ways of supporting the nervous system in returning to a more regulated state. Mindfulness can help us notice internal sensations without immediately reacting to them. Conscious breathing can influence physiological arousal and help the body shift out of a heightened state of activation. Physical movement and exercise can provide an outlet for some of the energy mobilised during stress, while meditation can gradually strengthen our capacity to remain present with thoughts, emotions and bodily sensations without automatically being carried away by them.

None of these practices is about forcing ourselves to relax or trying to remain calm all the time. Rather, they can help us become more aware of our internal state and gradually develop a different relationship with it.

With practice, we become more familiar with what regulation actually feels like — not simply as an idea, but as an experience in the body.

Beyond Survival

Survival patterns are not signs that the nervous system has failed.

Quite the opposite.

They are often evidence of a system that became extremely good at protecting us.

The issue is that strategies developed for one chapter of our lives can quietly follow us into the next.

Healing is not about fighting those responses or trying to become permanently calm. It is about helping the mind and body recognise that the circumstances have changed — and that the strategies which once felt necessary may no longer need to run the show.

Over time, SOMETHING BEGINS TO SHIFT.

There is a little more space before reacting. Uncertainty becomes easier to tolerate. Rest no longer feels quite so uncomfortable. We become less driven by the need to anticipate, control or protect ourselves from every possible outcome.

The goal is not a life without stress.

It is a life in which we are no longer organised around the anticipation of what might go wrong, and have more freedom to respond to what is actually happening in the present.

Beyond Insight: How Meditation Supports Lasting Therapeutic Change

By the time we begin psychotherapy, many of us already know quite a lot about ourselves.

We may know where our anxiety started. We recognise the patterns that keep repeating. We can often explain, with remarkable clarity, why we react the way we do.

And yet, when the familiar trigger appears, there we are — reacting in exactly the same old way.

Knowing why we do something, unfortunately, does not automatically stop us from doing it. If it did, psychotherapy would probably be a much shorter process.

This is one of the reasons I have become increasingly interested in what happens beyond insight.

Understanding ourselves matters enormously. But lasting change also requires something more experiential: the opportunity to PRACTISE DIFFERENT WAYS OF THINKING, FEELING AND REACTING until, gradually, they begin to feel less like an effort and more like a natural way of being.

Neuroplasticity: The Brain Is Not as Fixed as We Once Thought

For many years, the adult brain was considered relatively fixed. We now know that it remains capable of adapting and reorganising throughout life.

This capacity is known as neuroplasticity.

Our repeated experiences matter. Thoughts, behaviours and emotional responses that occur again and again can strengthen familiar neural pathways, making certain reactions increasingly automatic.

This helps explain something I often see in therapy: we may consciously know that a situation is safe, that an old belief is no longer true, or that a particular reaction is disproportionate — and still feel our body and mind have an EMOTIONAL REACTION as though nothing has changed.

The encouraging part is that our patterns are not necessarily permanent.

New experiences, repeated over time, can support different ways of responding. Change is rarely immediate or perfectly linear, but the brain retains a remarkable capacity to learn.

How My Practice Has Evolved

When I started working as a clinical psychologist, in Paris, over twenty years ago, my work was firmly rooted in a psychodynamic approach. I believed deeply — and still do — in the importance of understanding our inner world, exploring early relationships and making sense of the experiences that have shaped us.

Those years taught me how powerful insight can be. Being genuinely heard and understood, sometimes for the first time, can be profoundly healing. So can finally making sense of a pattern that has followed us for years.

But as my practice evolved, one question kept returning:

What actually helps us move from understanding a pattern to changing it?

My growing interest in NEUROSCIENCE, MEDITATION, THE NERVOUS SYSTEM AND CONSCIOUSNESS gradually changed the way I thought about this question — and, inevitably, the way I worked.

I didn’t move away from psychotherapy. I expanded what I understood psychotherapy could include.

Understanding ourselves is still central to my work, but it is no longer the whole picture. I integrate meditation, mindfulness, body awareness and nervous system regulation into the therapeutic process.

Not as an alternative to therapy, and certainly not as a way of sitting peacefully with our eyes closed while hoping our problems disappear.

But as a way of helping what we understand intellectually become something we can actually experience differently.

Recognising a pattern and responding differently when it is activated are two different things.

This is where meditation can become particularly interesting.

Rather than analysing every thought that appears, meditation teaches us to notice what is happening in the body, without immediately reacting.

That moment may be tiny at first. Sometimes almost ridiculously tiny.

But the space between a trigger and our habitual response is often where meaningful change begins.

Many people associate meditation with relaxation, and of course it can be deeply calming.

But that is not really what interests me most about it therapeutically.

The aim is not to become wonderfully peaceful for twenty minutes and then lose that peace the moment the trigger appears.

The more interesting question is whether what we practise during meditation gradually begins to influence how we meet everyday life.

Can we notice an anxious thought without immediately believing it? Can we feel an emotion without becoming completely overwhelmed by it? Can we recognise when an old pattern has been activated and create enough space to choose what happens next?

Regular meditation practice has been associated with changes in brain networks involved in attention, emotional regulation and stress processing. Research also suggests that meditation may influence regions involved in learning and memory, although findings vary and the effects depend on many factors, including the type and consistency of practice.

For me, however, the most useful way of thinking about meditation is not as something that magically “rewires the brain”.

It is A PRACTICE THAT CREATES REPEATED OPPORTUNITIES TO EXPERIENCE OURSELVES DIFFERENTLY.

And repeated experience is one of the ways change becomes embodied rather than simply understood.

How I Integrate Meditation Into Therapy

Meditation is never used as a way of bypassing difficult emotions or replacing the psychological work that needs to happen.

Depending on the person and the therapeutic process, meditation or mindfulness practices may help us notice how emotions first appear in the body, create space between a trigger and an automatic reaction, remain present with uncomfortable experiences, or reinforce new perspectives that emerge through therapy.

There is no expectation to become “good” at meditation.

A wandering mind is not evidence that you are doing it badly. It is, inconveniently, part of the practice.

The intention is simply to develop a different relationship with what happens inside us — one in which thoughts, sensations and emotions can be noticed without always having to dictate what our behaviour.

Understanding ourselves is an essential part of HEALING.

But transformation often asks us to go further.

It asks us to experience something different, practise something different and, over time, become increasingly familiar with a different way of being.

This is also where mental rehearsal can become particularly powerful. Rather than allowing the mind to continually anticipate the future through the lens of what has already happened, we can INTENTIONALLY begin to imagine and rehearse different ways of thinking, feeling and responding.

In doing so, we are no longer simply repeating a future shaped by the past. WE ALLOW NEW POSSIBILITIES. We create a future that is not entirely determined by our previous experiences, emotional patterns or habitual responses.

This does not mean pretending the past did not happen, or simply thinking our way into a different life. It means giving the brain and nervous system an opportunity to become familiar with possibilities they may not yet have experienced.

Not because one approach has all the answers, but because human beings are more complex than that.

Change rarely happens overnight. Old patterns can be surprisingly persistent — they have usually had plenty of practice.

The more we repeat and relive the old story, the more we allow the past to shape our present experience — and, often, the future we unconsciously expect.

But with awareness, time, and the right therapeutic support, different ways of thinking, feeling and relating can gradually become more available to us.

Insight helps us understand the story we have been living. Experience gives us the option to transform ourselves.