Zoning Out Is a Crucial Mental State
Sometimes you just have to bump the background processes’ priority.
The regions of the brain that become active during mind wandering belong to two important networks. One is known as the executive control system. Located mainly in the front of the brain, these regions exert a top-down influence on our conscious and unconscious thought, directing the brain’s activity toward important goals. The other regions belong to another network called the default network. In 2001 a group led by neuroscientist Marcus Raichle at Washington University discovered that this network was more active when people were simply sitting idly in a brain scanner than when they were asked to perform a particular task. The default network also becomes active during certain kinds of self-referential thinking, such as reflecting on personal experiences or picturing yourself in the future.
