Obliquus capitis superior muscle
Encyclopedia
The Obliquus capitis superior muscle 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.
Suboccipital nerve
The first cervical nerve, the suboccipital nerve exits the spinal cord between the skull and the first cervical vertebra, the atlas.It supplies muscles around the suboccipital triangle including the rectus capitis posterior major, obliquus capitis superior, and obliquus capitis inferior. The...
, the dorsal ramus of the first spinal nerve
Spinal nerve
The term spinal nerve generally refers to a mixed spinal nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body...
.
It acts at the atlanto-occipital joint
Atlanto-occipital joint
The Atlanto-occipital joint consists of a pair of condyloid joints. The atlanto-occipital joint is a synovial joint.-Ligaments:The ligaments connecting the bones are:* Two Articular capsules...
to extend the head and flex the head to the ipsilateral side.