The vestibular system provides information about head position.

The vestibular system provides information about head position.

• A. Visual system
• B. Vestibular system
• C. Cochlea
• D. Olfactory system

Answer: (B)

The ability to sense head position comes from the vestibular apparatus in the inner ear. It has two key parts: otolith organs (utricle and saccule) that detect linear acceleration and tilt relative to gravity, and semicircular canals that sense rotational movement. When your head tilts, gravity causes a shift in the otolith membranes and hair cells respond, signaling orientation changes. When you rotate your head, the flow of endolymph in the semicircular canals deflects hair cells, signaling angular movement. The brain integrates these signals with visual and proprioceptive information to maintain balance and stabilize vision. While the visual system and other senses provide contextual cues, the vestibular system is the direct source of information about head position, making it the best fit.

The ability to sense head position comes from the vestibular apparatus in the inner ear. It has two key parts: otolith organs (utricle and saccule) that detect linear acceleration and tilt relative to gravity, and semicircular canals that sense rotational movement. When your head tilts, gravity causes a shift in the otolith membranes and hair cells respond, signaling orientation changes. When you rotate your head, the flow of endolymph in the semicircular canals deflects hair cells, signaling angular movement. The brain integrates these signals with visual and proprioceptive information to maintain balance and stabilize vision. While the visual system and other senses provide contextual cues, the vestibular system is the direct source of information about head position, making it the best fit.