Which system coordinates head movements?

Which system coordinates head movements?

• A. Motor system
• B. Cerebellar system
• C. Vestibular system
• D. Sensory system

Answer: (C)

The vestibular system is the one that coordinates head movements. Its inner-ear sensors detect how the head is moving and its orientation in space, sending signals to brainstem circuits that drive neck and eye muscles. This enables rapid reflexes like the vestibulo-ocular reflex, which moves the eyes in the opposite direction of head movement to keep the visual scene stable, and the vestibulospinal and vestibulocollic pathways that help adjust head and body posture. While the motor system provides the commands for movement and the cerebellum fine-tunes timing and precision, the vestibular system is the primary coordinator of head motion through these reflexes that integrate movement with gaze and balance.

The vestibular system is the one that coordinates head movements. Its inner-ear sensors detect how the head is moving and its orientation in space, sending signals to brainstem circuits that drive neck and eye muscles. This enables rapid reflexes like the vestibulo-ocular reflex, which moves the eyes in the opposite direction of head movement to keep the visual scene stable, and the vestibulospinal and vestibulocollic pathways that help adjust head and body posture. While the motor system provides the commands for movement and the cerebellum fine-tunes timing and precision, the vestibular system is the primary coordinator of head motion through these reflexes that integrate movement with gaze and balance.