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Obliquus Capitis Superior MuscleIt arises from the lateral mass of the atlas bone. It passes superiorly and posteriorly to insert into the lateral half of the inferior nuchal line. It is innervated by the suboccipital nerve, the dorsal ramus of the first spinal nerve. It acts at the atlanto-occipital joint to extend the head and flex the head to the ipsilateral side.
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