The oculocephalic reflex is another name for which vestibular reflex?

The oculocephalic reflex is another name for which vestibular reflex?

• A. Vestibulo-ocular reflex
• B. Optokinetic reflex
• C. Vestibulospinal reflex
• D. Gag reflex

Answer: (A)

Gaze stabilization during head movement is coordinated by the vestibulo-ocular reflex. When the head turns, the semicircular canals detect the angular acceleration and send signals to the vestibular nuclei, which then drive the eye muscles in the opposite direction to keep the visual image steady on the retina. This same mechanism is what the oculocephalic reflex tests in a clinical setting, often described as the doll’s eyes response, confirming an intact brainstem and vestibulo-ocular pathway. The other reflexes rely on different inputs: the optokinetic reflex depends on tracking a moving visual scene and combines visual motion with eye movements, not primarily vestibular input; the vestibulospinal reflex influences posture and limb muscles rather than eye movements; and the gag reflex involves the cranial nerves IX and X, unrelated to eye stabilization.

Gaze stabilization during head movement is coordinated by the vestibulo-ocular reflex. When the head turns, the semicircular canals detect the angular acceleration and send signals to the vestibular nuclei, which then drive the eye muscles in the opposite direction to keep the visual image steady on the retina. This same mechanism is what the oculocephalic reflex tests in a clinical setting, often described as the doll’s eyes response, confirming an intact brainstem and vestibulo-ocular pathway.

The other reflexes rely on different inputs: the optokinetic reflex depends on tracking a moving visual scene and combines visual motion with eye movements, not primarily vestibular input; the vestibulospinal reflex influences posture and limb muscles rather than eye movements; and the gag reflex involves the cranial nerves IX and X, unrelated to eye stabilization.