The Optic, Oculomotor, Trochlear, and Abducens Nerves all innervate the eye and are referred to as Cranial Nerves _________________:

Question

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The question asks which cranial nerves are associated with innervation related to the eye, and presents four options to choose from.
Option 1: '2, 3, 4, and 6' — This set includes Cranial Nerve II (optic), III (oculomotor), IV (trochlear), and VI (abducens). Among these, III, IV, and VI are the motor nerves that innervate the extraocular muscles controlling eye movements, while II is primarily a sensory nerve for vision rather than a motor innervation of the eye muscles. So this option includes a non-motor nerve, which makes the grouping imperfect if the criterion is only motor innervation of eye muscles.
Option 2: '1, 8, 9, and 11' — Cranial Nerve I is the olfactory nerve, unrelated to eye function. CN VIII is vestibulocochlear, CN IX is glossopharyngeal, and CN XI is accessory; none of these are involved in controlling the eye muscles. This option clearly mismatches the anatomical context, so it is incorrect.
Option 3: '1, 3, 5, and 12' — This pairing includes CN I (olfactory) and CN V (trigeminal) alongside CN XII (hypoglossal). Neither CN I nor CN XII innervates eye muscles, and while CN V has some sensory input around the eye region, it does not constitute the primary motor innervation of the eye muscles. Therefore this option does not fit the known cranial nerve innervations of the eye.
Option 4: '1, 7, 8, and 11' — This combination includes CN VII (facial), CN VIII (vestibulocochlear), CN I (olfactory), and CN XI (accessory). Again, none of these collectively describe the cranial nerves that innervate the eye muscles or the functional group associated with eye movement, so this option is also incorrect.

In sum, several options mix nerves that do not innervate the eye muscles, while the most relevant grouping for the extraocular motor control consists of cranial nerves III, IV, and VI. The presence of II in the same group is the point of contention, but many exam questions list 2, 3, 4, and 6 as the commonly cited set associated with eye-related cranial nerves, recognizing that II is involved in vision of the eye rather than motor innervation. The other options fail because they contain nerves that are unrelated to eye movement or provide an inconsistent combination not aligning with eye innervation anatomy.

hk_264_120258_248438 Chapter 7 Quiz: Nervous System and Special Senses

The Optic, Oculomotor, Trochlear, and Abducens Nerves all innervate the eye and are referred to as Cranial Nerves _________________:

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