What Is the Default Mode Network? The default mode network (DMN) is a system of connected brain areas that show increased activity when a person is not focused on what is happening around them. The ...

When your mind is wandering, your brain’s “default mode” network is active. Its discovery 20 years ago inspired a raft of research into networks of brain regions and how they interact with each other.

When I first heard the term "default mode network," I wondered if it had something to do with telephones or the internet. It doesn't. What it does have to do with is much more intriguing. The default ...