What are brain networks?

Brain networks are composed of different interconnected brain regions that work together to perform various functions. These networks can be active or suppressed depending on the task at hand. One well-known network is the Default Mode Network (DMN), which is active during periods of rest and helps in autobiographical thinking, imagination, and planning. Conversely, when focused tasks are required, such as reading or learning, the activity in the DMN is suppressed by other areas like the prefrontal cortex which helps maintain attention and suppress unneeded distractions 1.

In addition to the Default Mode Network, there are other networks like the salience network and the dorsal attention network, which have different roles, particularly in how they manage attention and the processing of relevant stimuli 1.

Understanding these networks and their interactions can explain phenomena such as why individuals with ADHD have difficulty suppressing the DMN during tasks that require focus, leading to distractibility 2.

Moreover, repeated actions or thoughts (like in self-hypnosis) can strengthen the connections within these networks, potentially improving functions such as memory or learning 3. These networks' modularity can also influence how well individuals respond to various interventions, affecting overall cognitive function and brain health 4.