verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style

What is the brain?

The brain is the main organ of the nervous system and the center for processing information. Together with the spinal cord, it forms the central nervous system. The brain combines sensory information and directs motor responses to produce coordinated movement. It also regulates automatic processes, including breathing and heart rate, and supports learning, memory, language, emotion, and decision-making.