Final answer:
The cerebellum, also known as the "little brain," ensures coordination of movements and balance, playing a vital role in tasks requiring precise motor skills.
Step-by-step explanation:
The "little brain" involved especially in coordinating movement requiring aiming and timing is the cerebellum. Situated at the base of the brain on top of the brainstem, the cerebellum is critical for tasks such as catching a ball where it facilitates the coordination of head and eye movements. It encompasses various functions including control of balance, coordination, and learning new motor tasks. Approximately 10 percent of the brain's mass is accounted for by the cerebellum, illustrating its significance in the motor function of the nervous system. The cerebellum controls balance, aids in coordinating movement, and learning new motor tasks.