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What is the CN 4? What muscle does it innervate?
Trochlear Nerve, Innervates the Superior Oblique.
What is the primary function of the Superior Oblique?
It is a depressor, especially when the patient looks towards his nose.
What are the 4 questions to ask a patient who complains of diplopia?
- 1. Does the double vision disappear when you cover an eye?
- 2. Does the double vision appear side to side or up and down?
- 3. Is the double vision worse when you look to the right or to the left?
- 4. Is the double vision worse when you look up close or afar?
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