HEAD NECK
ROOT OF NECK
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following extrinsic muscles of the eye are NOT innervated via the oculomotor nerve (aka optic nerve)?1. Superior Rectus 2. Superior Oblique3. Medial Rectus4. Lateral Rectus5. Inferior Oblique6. Inferior Rectus
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1, 2, 3, & 4
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2 & 4 only
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4, 5, & 6
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4 & 6 only
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Explanation:
Detailed explanation-1: -The oculomotor nerve controls all muscles of the eye except for the superior oblique muscle controlled by the trochlear nerve (IV), and the lateral rectus muscle controlled by the abducens nerve (VI).
Detailed explanation-2: -Hypoglossal nerve does not innervate an extrinsic eye muscle and is not tested using the same procedure as cranial nerves III, IV, and VI.
Detailed explanation-3: -The extraocular muscles are innervated by lower motor neurons that form three cranial nerves: the abducens, the trochlear, and the oculomotor (Figure 20.3).
There is 1 question to complete.