Anatomy
Origin:
Spinous process of axis.
Insertion:
Transverse process of the atlas.
Key Relations:
Forms the inferior and lateral border of the suboccipital triangle.
Functions
Rotates head to ipsilateral side at atlanto-axial joint.
Supply
Innervation:
Suboccipital nerve (C1).
Blood supply:
Muscular branches of vertebral artery.
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