The default mode network is a system of connected brain areas that show increased activity when a person is not focused on what is happening around them. The DMN is especially active, research shows, when one engages in introspective activities such as daydreaming, contemplating the past or the future, or thinking about another person's perspective. Unfettered daydreaming can often lead to creativity . The default mode network is also active when a person is awake. However, in a resting state, w
How Default Mode Network Affects Mental Illness
The default mode network is about self-focus and mental time-travel, and its inactivity appears to be related to varied forms of mental illness. The DMN is involved in episodic memory processing, with introspection and autobiographic memory as important cognitive processes. Researchers have reported dysregulation between the components of the default mode network in patients with Alzheimer’s disease as well as those with Parkinson’s disease, illnesses that affect memory processing.
Connectivity between particular default mode network areas of the brain has been linked to higher levels of rumination in depressed individuals. The depressed among us ruminate about their regrets, failures, shame , and anger . Further links with default mode network dysregulation have been made to autism , schizophrenia, and other conditions.
The default mode network is more connected in the brains of lonely people. There is more activity in the DMN in the brains of lonely people . These people spend a lot of time thinking about what happened in the past and what will happen in the future, all with feelings of worry, anxiety , and dread.
The DMN is also thought to play a role, in combination with other brain networks, in key qualities such as creativity. As a person idles and her mind drifts, the activity of the DMN may help give rise to ideas that other networks then vet and process further.
How the Default Mode Operates
The default mode network, discovered by neurologist Marcus Raichle, spans several brain regions, parts of the prefrontal, parietal, and temporal cortices that show joint activation, or deactivation, in connection with particular mental functions. It is one of several such brain networks, including the salience network and the executive control network.
This network uses nodes in the insular cortex; it alerts us to what is important and where we should focus our attention. If you are feeling fearful, the salience network kicks in, searching for threats that may endanger you.
The executive control network monitors what is happening around us, it manages emotional parts of the brain, it directs our attention, and is crucial in decision-making . It also helps process sensory and memory information.
The task-positive network is known as the opposite of the default mode network. The brain’s TPN kicks in when we are focused and engaged in a task. Also known as the dorsal attention network, this network involves brain areas—the prefrontal regions and the intraparietal sulcus. If a task demands attention, the network wants to be as alert as possible.
How to Calm the Default Mode Network
Relaxation techniques, mindfulness , meditation , and even deep breathing can quiet the default mode network. A study that appeared in the journal Cognitive, Affective, and Behavioral Neuroscience showed that meditation is associated with reduced activity in the default mode network
In a study of meditators, some were more adept at meditating, and others were more neophyte. The more experienced meditators had much less activity in the default mode network; they were much better than the neophyte in curtailing mind-wandering. In another study in Biological Psychiatry , researchers found that meditation quiets the DMN and boosts well-being through decreased inflammation and stress .
Any experience of awe , such as hiking to a mountain top, watching the moon rise, or swimming in the ocean, can take you out of your mind. Your focus is not on everyday worries, but more on the big picture. We are insignificant in the grand scheme, and we do not have to stew in our troubles.
Experiencing the emotion of awe, research shows, helps support our overall well-being.
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