The levator scapulae arises by four slips from the transverse processes
of the upper four cervical vertebrae.
The slips unite to form an elongated muscle which extends downwards and
backwards to be inserted into the medial border of the scapula
from the upper angle to the spine. The muscle is cleft lengthwise into two
parts; and the uppermost fibers of origin are the lowest at the insertion.
The nerve supply is derived from the third and fourth cervical nerves, and
also from the nerve to the rhomboids.
The muscle assists in elevation and rotation of the scapula and helps to
fix and steady it in active movements of the upper limb.
|Levator scapulae shown in red
• posterior triangle