Which part of the brain maintains posture and equilibrium of the body?

The cerebellum is the part of the brain that helps you stand straight, walk without falling, and maintain your balance.

The cerebellum, situated at the back of the brain beneath the cerebrum, is responsible for maintaining posture, balance, and equilibrium of the body. It coordinates voluntary muscle movements and ensures smooth, precise motor actions. It receives information from the inner ear (vestibular system), eyes, and proprioceptors in muscles and joints about the body's position. Based on this information, the cerebellum continuously adjusts muscle tone and coordinates movements. Damage to the cerebellum results in unsteady gait, tremors, and inability to perform coordinated movements.