Origin, Insertion, and Action of Muscles PDF

### Origin * Inferior angle of Scapula, Spinous Process T6-T12, Thoracolumbar Aponeurosis, Iliac Crest of Ilium, Lower 3 Ribs (9-12) **LATISSIMUS DORSI** * Anterior Lateral 1/3 of Clavicle **ANTERIOR DELT** * Acromion Process of Scapula, Spine of Scapula **MIDDLE DELT** * Inferior angle of...

### Origin * Inferior angle of Scapula, Spinous Process T6-T12, Thoracolumbar Aponeurosis, Iliac Crest of Ilium, Lower 3 Ribs (9-12) **LATISSIMUS DORSI** * Anterior Lateral 1/3 of Clavicle **ANTERIOR DELT** * Acromion Process of Scapula, Spine of Scapula **MIDDLE DELT** * Inferior angle of Scapula, Lower 1/3 of lateral boarder of Scapula **TERES MAJOR** * Spine of Scapula **POSTEROR DELT** * External Occipital Protuberance of Occipital Bone, C7-T12 **TRAPEZIUS** * Supraspinatus Fossa of Scapula **SUPRASPINATUS** * Spinous Processes of T2 to T5 **RHOMBOID MAJOR** * Transverse processes C1 to C4 **LEVATOR SCAPULAE** * Upper 8-9 ribs **SERRATUS ANTERIOR** * Coracoid Process (Short Head), Supraglenoid tubercle (long head) **BICEPS BRACHII** * Infraspinatus Fossa of Scapula **INFRASPINATUS** * Lateral Border of Scapula **TERES MINOR** * Subscapular Fossa of Scapula **SUBSCAPULARIS** * Coracoid process **CORACOBRACHIALIS** * Spinous Processes of C7 to T1 **RHOMBID MINOR** * Clavicle (medial ½), sternum, cartilage of ribs 1-6 **PECTORALIS MAJOR** * Ribs 3-5 **PECTORALIS MINOR** * 1st rib **SUBCLAVIUS** * Infraglenoid Tubercle (Long Head), Posterior, proximal ½ of Humerus (lateral head), Posterior, distal ½ of Humerus(medial head) **TRICEPS BRACHII** ### Insertion * Deltoid Tuberosity of Humerus **DELTOID** * Deltoid Tuberosity of Humerus **DELTOID** * Deltoid Tuberosity of Humerus **DELTOID** * Bicipital Groove of Humerus **LATISSIMUS DORSI** * Greater Tubercle of Humerus **SUPRASPINATUS** * Greater Tubercle of Humerus **INFRASPINATUS** * Greater tubercle (humerus) **PECTORALIS MAJOR** * Greater Tubercle of Humerus **TERES MINOR** * Lesser Tubercle of Humerus **SUBSCAPULARIS** * Clavicle(inferior surface, middle 1/3) **SUBCLAVIOUS** * Coracoid Process (medial surface) **PECTORALIS MINOR** * Olecranon Process **TRICEPS BRACHII** * Radial Tuberosity **BICEPS BRACHII** * Medial border of scapula (anterior surface) **SERRATUS ANTERIOR** * Medial border of scapula (superior angle) **LEVATOR SCAPULAE** * Medial border of scapula (across from spine) **RHOMBOID MINOR** * Medial border of scapula (between spine and inferior border) **RHOMBOID MAJOR** * Medial surface, mid shaft of Humerus **CORACOBRACHIALIS** * Lesser Tubercle of Humerus **TERES MAJOR** * Lateral 1/3 of Clavicle, Acromion of Scapula, Spine of Scapula **TRAPEZIUS** ### Action * Abduct, Flex, Internally Rotate, Horizontal, Adduct Shoulder **ANTERIOR DELT** * Extend, Adduct, Internally Rotate, Horizontal Abduction of Shoulder **LATISSIMUS DORSI** * Abduct, Extends, Externally Rotates, Horizontally Abducts Shoulder **POSTERIOR DELT** * Upper-Extend/Laterally Flex Head, Rotate Head, Elevate/Upward Rotate Scapula, Middle-Scapular Adduction, Lower-Depression, Downward Rotation of Scapula **TRAPEZIUS** * Extend, Adduct, Internally Rotate Shoulder **TERES MAJOR** * Abducts Shoulder **MIDDLE DELT** * Flex the elbow, Supinate Forearm, Flex the shoulder **BICEPS BRACHII** * Extend elbow **TRICEPS BRACHII** * Flex the Shoulder, Adduct Shoulder **CORACOBRACHIALIS** * Adduct Scapula, Elevate Scapula, Downward rotation of Scapula **RHOMBOID MAJOR** * External Rotation, Horizontal Abduction, Extension, Stabilize head of humerus **INFRASPINATUS** * Internal Rotation, Stabilize head of humerus **SUBSCAPULARIS** * Abduct Shoulder, Stabilize head of humerus **SUPRASPINATUS** * Adduct Scapula, Elevate Scapula, Downward rotation of Scapula **RHOMBOID MINOR** * Elevate Scapula, Downwardly rotate scapula, Laterally flex/rotate neck/extend neck **LEVATOR SCAPULAE** * Depress Clavicle, Elevate 1st rib, Stabilize SC Joint **SUBCLAVIUS** * Depress Scapula, Abduct Scapula, Downward Rotation of Scapula **PECTORALIS MINOR** * Abduct scapula, Upward rotation of scapula, Depress scapula, Holds medial border of scapula to rib cage **SERRATUS ANTERIOR** * Adduct shoulder, Internal rotation, Elevate thorax during inhalation, Flex shoulder (upper fibers), Horizontally adduct (upper fibers), Extend shoulder (lower fibers) **PECTORALIS MAJOR**