Levator scapulae

Levator scapulae is a long and slender muscle that anatomically belongs to the superficial layer of extrinsic muscles of the back. Functionally, however, it is considered to be a muscle of scapular motion along with the rhomboids, serratus anterior, serratus posterior superior and inferior muscles. The levator scapulae muscle extends from the transverse processes of vertebrae C1-C4 to the medial border of scapula.
As its name suggests, the main function of this muscle is to elevate the scapula. Additionally, levator scapulae acts with the trapezius, latissimus dorsi, rhomboids, pectoralis major and pectoralis minor muscles to inferiorly rotate the glenoid cavity, stabilise the spine, and extend and laterally flex the scapula.
The levator scapulae muscle is innervated by the anterior rami of spinal nerves C3 and C4 and the dorsal scapular nerve (C5), a branch of the brachial plexus.
The main function of the levator scapulae muscle is to elevate and retract the shoulder girdle at the scapulothoracic joint. At the same time, it helps in preventing the depression of the girdle when carrying heavy loads. Additionally, the muscle participates in the stabilisation of the scapula and the inferior rotation of the glenoid cavity.