Fast, effective communication between the cerebellum and other parts of the brain and body is essential for smooth, coordinated movements to take place. When a baseball player swings a bat, for instance, his eyes must judge how fast the ball is approaching, his brain must send the intent of movement to the muscles, and the cerebellum must coordinate all incoming information in such a way that the arms move around the body at the appropriate level and with sufficient force to hit the ball. In order to do this, the cerebellum must make corrections almost instantaneously depending on the information it receives, enabling good players to hit a curve ball even if they were expecting a different type of pitch.