Action Flexion Muscles Ant. Deltoid Coracobracialis Post. Deltoid Extension Latissimus Dorsi Insertion/Origin Acromion/Clavicle->humerus Coracoid->Med Humerus Spine of scapula->humerus Iliac crest/spine/ribs/ inferior angle of scapula-> intertubercular groove Innervation Axillary N 5,3 Seated 2,1 Side lying Musculocutaneus n. Axillary N Prone Side lying Thoracodorsal N. Inferior angle->intertubercular groove Scaption Horizontal Abduction Horizontal Adduction External Rotation Teres Major Deltoid Acromion/Clavicle->humerus Subscapular N. Axillary N Seated Suprispinatus Post. Deltoid Supraspinous fossa-> Greater Tubercle Spine of scapula->humerus Suprascapular N Axillary Prone Pectoralis Major Intertubercular Groove -> Sternum/Clavicle Infraspinous fossa->Greater Tubercle Inferior angle/Lat Border of scapula>Greater Tubercle Med and Lateral Pectoralis N. Suprascapular N Subscapular N. Latissimus Dorsi Subscapular Fossa-> lesser tubercle Iliac crest/spine/ribs/ inferior angle of scapula-> intertubercular groove Teres Major Inferior angle->intertubercular groove Subscapular N. Infraspinatus Teres Minor Internal Rotation Subscapularis Supine Prone Axillary N. Thoracodorsal N Prone Seated with arm on table Seated with arm on table Seated or have them twist from prone Seated or have them twist from prone Action Scapular Abduction/Upward Rotation Scapular Elevation Muscle Serratus Anterior Upper Trapezius Levator Scapulae Scapular Adduction Middle Trapezius Scapular Lower Trapezius Depression/Adduction Scapular Rhomboids Adduction/Downward Rotation Origin/Insertion Ribs->Ant surface of medial border of scapula Spine of the scapula>Cervical vertibrae and skull Superior Angle of Scapula-> Cervical Vertibrae Spinous Processes-> Spine of scapula Spinous Processes-> Spine of Scapula Spinous processes>Medial border of scapula Innervation Long Thoracic N. Seated 5,3 2,1 Spinal Accessory N Seated Prone Spinal Accessory N. Prone Seated? Spinal Accessory N Prone Dorsal Scapular N. Prone – arm behind lower back Dorsal Scapular N. Have life arm off lower back in prone