The advanced practice registered nurse (APRN) recognizes that extraocular movements are assessed by testing which cranial nerves?

A. II, III, IV is incorrect because cranial nerve II (optic nerve) is responsible for vision and visual acuity, not eye movement. While cranial nerves III and IV do contribute to eye movements, this option omits cranial nerve VI, which is also essential. B. III, IV, VI is correct because cranial nerves III (oculomotor), IV (trochlear), and VI (abducens) control the six extraocular muscles that move the eyes in all directions. Assessing extraocular movements involves testing these three nerves by having the client follow a target through the six cardinal positions of gaze. Any limitation, nystagmus, or asymmetry can indicate cranial nerve dysfunction or muscular pathology. C. V and VII is incorrect because cranial nerve V (trigeminal) controls facial sensation and mastication, and cranial nerve VII (facial) controls facial expression. Neither of these nerves is responsible for moving the eyes. D. IX and X is incorrect because cranial nerve IX (glossopharyngeal) and cranial nerve X (vagus) are involved in swallowing, gag reflex, and parasympathetic functions, not eye movements.