Obliquus Capitis Superior: The obliquus capitis superior is located laterally in the suboccipital compartment. It is narrow below, wide and expanded above, and is lateral to the semispinalis capitis. It forms the superolateral border of the suboccipital triangle.
Origin: Originates from the transverse process of C1
Insertion: It inserts into the occipital bone (between the superior and inferior nuchal lines).
Function: Extension of the head.
Nerve Supply: Suboccipital nerve (posterior ramus of C1)
Blood Supply: Obliquus Capitis Superior muscle receives its blood supply from the vertebral artery and the deep descending branch of the occipital artery.