CVS Practice Test 2025 - Free CVS Practice Questions and Study Guide

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Which nerve is responsible for the afferent pathway of the oculocardiac reflex?

Hypoglossal nerve (CN XII)

Ophthalmic division of trigeminal nerve (CN V)

The afferent pathway of the oculocardiac reflex is mediated by the ophthalmic division of the trigeminal nerve (CN V). This reflex occurs when the eyes are affected in response to pressure on the eyeball, leading to bradycardia and other cardiovascular changes. Specifically, the sensory component of the reflex involves the ophthalmic division, which is responsible for transmitting sensory information from the cornea and the eye area to the brain.

In this context, the other options are related to different functions: the hypoglossal nerve is primarily involved in motor control of the tongue, the facial nerve is mainly responsible for facial expressions and the parasympathetic innervation of certain glands, while the optic nerve is dedicated to vision. None of these nerves play a role in the sensory aspect of the oculocardiac reflex, making the ophthalmic division of the trigeminal nerve the correct answer for its afferent pathway.

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Facial nerve (CN VII)

Optic nerve (CN II)

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