Palpebral reflex involves which nerves?

Palpebral reflex involves which nerves?

• A. V and VII
• B. II and VII
• C. V and VI
• D. III and IV

Answer: (A)

Palpebral reflex tests the sensory input from the eyelid carried by the trigeminal nerve and the motor output to close the eyelid carried by the facial nerve. When you touch the eyelid margin, the afferent signal travels via the ophthalmic branch of the trigeminal nerve to the brainstem, which then triggers the facial nerve to contract the orbicularis oculi and produce a blink. So the reflex relies on V for sensation and VII for eyelid closure, making that pairing the correct one. The other nerves listed aren’t responsible for eyelid blink—the optic nerve handles vision, and III, IV, and VI control eye movements rather than eyelid closure.

Palpebral reflex tests the sensory input from the eyelid carried by the trigeminal nerve and the motor output to close the eyelid carried by the facial nerve. When you touch the eyelid margin, the afferent signal travels via the ophthalmic branch of the trigeminal nerve to the brainstem, which then triggers the facial nerve to contract the orbicularis oculi and produce a blink. So the reflex relies on V for sensation and VII for eyelid closure, making that pairing the correct one. The other nerves listed aren’t responsible for eyelid blink—the optic nerve handles vision, and III, IV, and VI control eye movements rather than eyelid closure.