Final answer:
The cerebellum is the part of the brain especially active in locating the positions of a gymnast's arms and legs while practicing on the balance beam, aiding in coordination and balance.
Step-by-step explanation:
A young gymnast practicing on the balance beam requires precise coordination of the positions of her arms and legs. The part of the brain that will be especially active in locating the positions of her arms and legs is the cerebellum. The cerebellum is essential for maintaining balance and aids in coordinating movement. Therefore, when performing on the balance beam, the cerebellum works intensively to help the gymnast execute movements smoothly and maintain her posture.
The cerebellum is located at the base of the brain on top of the brainstem and plays a crucial role in motor control. It does not initiate movement but contributes to coordination, precision, and accurate timing. When catching a ball, another region of the brain called the superior colliculus is involved in coordinating head and eye movements. Additionally, the cell body of neuron A, involved in abstract thought, problem-solving, and planning, is located in the frontal lobe. Overall, the cerebellum's function is integral to the coordination and balance required in gymnastics.