Origin/Insertion of Muscles - Back - Serratus Anterior

Serratus Anterior
Origin: Anterior and superior margins of ribs 1-9
Insertion: Anterior surface of medial vertebral border of scapula
Action: Protracts shoulder, abducts and medially rotates scapula (upward)

Serratus Anterior

Serratus Anterior

Origin/Insertion Serratus Anterior

Origin/Insertion of Muscles - Back - Rhomboids (Minor/Major)

Rhomboids
Origin: Spinous processes of the lower cervical spine (Minor - C7-T1) and upper thoracic vertebrae (Major - T2-T5)
Insertion: Vertebral border of the scapula
Action: Adducts (retracts) and rotates scapula laterally (downward)

Rhomboids - Minor and Major

Spinous Processes

Vertebral (medial) border

Origin/Insertion of Muscles - Back - Levator Scapulae

Levator Scapulae
Origin: Transverse Processes of the first 4 cervical Spine (C1-C4)
Insertion: Media; border of the scapula between spine and superior angle
Action: Elevates medial border of scapula while downwardly rotating lateral angle; helps trapezius and rhomboid muscles pull scapula upward and medially; bends neck laterally



Transverse Processes C1-C4

Medial Border Scapula; Superior angle