Which cranial nerve is responsible for downward and inward rotation of the eye?

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Study for the History and Physical (Handamp;P) Exam 1. Prepare with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

Which cranial nerve is responsible for downward and inward rotation of the eye?

Explanation:
Downward and inward rotation of the eye is produced mainly by the superior oblique muscle, which depresses the eye and intorts it, especially when the eye is adducted. This muscle is innervated by the trochlear nerve (cranial nerve IV), making this nerve responsible for that specific movement. The oculomotor nerve (CN III) supplies most of the other eye muscles, the abducens nerve (CN VI) controls the lateral rectus for outward movement, and the trigeminal nerve (CN V) does not control eye movements.

Downward and inward rotation of the eye is produced mainly by the superior oblique muscle, which depresses the eye and intorts it, especially when the eye is adducted. This muscle is innervated by the trochlear nerve (cranial nerve IV), making this nerve responsible for that specific movement. The oculomotor nerve (CN III) supplies most of the other eye muscles, the abducens nerve (CN VI) controls the lateral rectus for outward movement, and the trigeminal nerve (CN V) does not control eye movements.

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