Proximal Attachment
Longus capitis arises from the anterior tubercles of the transverse processes of C3 to C6.

Distal Attachment
It passes supero-medially, becoming thicker and broader, attaching to the inferior surface of the basilar part of the occipital bone.

Nerve Supply
It is supplied by the anterior rami of C1 to C3.

Action
Longus capitis flexes the head on the neck and is active in flexion of the upper cervical spine, especially against resistance.