Mental process is an ongoing activity of the brain that allows people to think, remember, and plan. The brain constantly processes information through a series of steps or processes, from receiving input to making decisions.

Mental processes are governed by rules and are based on observable facts. Mental processes are also reversible and can be modulated by attention and emotion.

Some mental processes are activated automatically, such as breathing or blinking. Other processes need to be activated by the brain, such as thinking or problem solving.

The parts of the brain that are involved in different mental processes vary from person to person.