Rectus capitis posterior major muscle :-
muscle details :-
arises by a pointed tendon from the spinous process of the axis, and, becoming broader as it ascends, is inserted into the lateral part of the inferior nuchal line of the occipital bone and the surface of the bone immediately below the line.
Spinous process of the axis (C2).
Inferior nuchal line of the occipital bone .
Dorsal ramus of C1 (suboccipital nerve), sub-occipital nerve .
Ipsilateral rotation of head and extension .