Muscles Of The Pectoral Girdle PDF

MUSCLES OF THE PECTORAL GIRDLE I I I MUSCLE ORIGIN INSERTION ACTION Levator scapulae first 4 cervical vertebrae border o...

MUSCLES OF THE PECTORAL GIRDLE I I I MUSCLE ORIGIN INSERTION ACTION Levator scapulae first 4 cervical vertebrae border of Scapula , near elevates scapula superior angle and medial end of scapular Spine pectoralis minor anterior surfaces of coracoid process of scapula depresses + protracts ribs 3-5 or 2-4 shoulder , downwards rotation rhomboid major vertebrae T2 to T5 vertebral border of Scapula adducts , downwards Spine to inferior angle rotation of scapula rhomboid minor vertebrae C2-TI vertebral border of scapula adducts , downwards rotation of scapula servatus anterior anterior + superior margins anterior surface of vertebral protracts shoulder ; of ribs border of scapula upward rotation subclavius first rib clavicle (inferior border Of depress + protract Middle 113) Shoulder trapezius occipital bone , ligamentum Clavicle + scapula may elevate, retract , nuchae , spinous process lacromion + scapular Spine) depress rotate scapula , of thoracic vertebrae upward , extend neck  I I I clavicular head : anterior surface adducts, medial rotation pectoralis of medial half of clavicle lateral lip of intertubular groove of of humerus , draws scapula major humerus anteriorly + inferiorly Sternocostal head : anterior surface acting alone Clavicular : of Sternum , costal head flexes humerus superior Six cartilage sternocostal head + aponeurosis of external and oblique muscle extends it  MUSCLES THAT MOVE THE ARM I I I MUSCLE ORIGIN INSERTION ACTION coracobrachialis coracoid process medial of shaft of humerus adduction + flexion at shoulder margin clavicle and scapula (acromion and whole muscle : abduction of shoulder flexion + medial rotation of humerus anterior part : deltoid adjacent scapular Spine) deltoid tuberosity of humerus posterior part extension lateral rotation of : + humerus humerus supraspinators supraspinous fossa of Scapula greater tubercle of abduction at shoulder infraspinators infraspinous fossa of scapula greater tubercle of humerus lateral rotation at shoulder subscapularis subscapular Fossa lesser tubercle of humerus medial rotation at the shoulder Teres major inferior angle of scapula medial lip of intertubular sulcus of humerus extension + medial rotation at the shoulder Teres Minor lateral border of scapula greater tubercle of humerus lateral rotation + adduction at shoulder latissimus of inferior thoracic floor intertubercular sulcus of humerus extension , adduction rotation dorsi spinous process and of , medial all lumbar and sacral vertebrae , ribs 8-12 , at the shoulder thoracolumbar facia clavicular head : anterior surface of medial 2 of clavicle lateral lip of intertubercular groove adducts medially rotates , humerus, draws scapula Sternocostal head : anterior surface of sternum superior , anteriorly + inferiorly 6 costal clavicular head : flexes Pectoralis cartilages of external oblique muscle humerus major , aponeurosis Sternocostal head : extends humerus long medial extension : forearm infraglenoid tubercle of long middle of medial surface shaft of the o a : of scapula humerus of at tricep brachii medial : posterior aspects of humerus , inferior to medial : posterior surface of the olecranon process of the ulna , capsule of elbow joint and fascia radial groove antebrachial long : extension - adduction of arm at shoulder lateral : posterior aspects lateral : antebrachia joint superior to of of the the humerus , radial groove posterior surface olecranon process of the ulna , capsule of elbow joint and Fascia Short : Covacoid process of scapulaa short : radial tuberosity of radius flexion + supination of forearm of bicep brachii long : Supraglenoid tubercle long : radial tuberosity radius  MUSCLES THAT FLEX FINGERS/WRIST 1 1 1 MUSCLE ORIGIN INSERTION ACTION flexor carpi radial is medial epicondyle of humerus bases of 2nd and 3rd metacarpal bones flexion and abduction of wrist flexor carpi ulnaris medial epicondyle of humerus , pisiform , hamate , base of fifth metacarpal flexion + adduction at adjacent medial surface of olecranon bone wrist and anteromedial portion of ulma palmaris longus medial epicondyle of humerus palmar aponeurosis + flexor refinaculum flexion at wrist MUSCLES THAT EXTEND WRIST/FINGERS 1 I extensor carpi radialis longus lateral supracondylar ridge of humerus base of second metacarpal bone flexion + abduction at w extensor carpi radialis brevis lateral epicondyle of humerus bace of third metacarpal bone extension + abduction wr extensor carpi ulnaris lateral epicondyle of humerus , adjacent base of fifth metacarpal bone extension and adduction dorsal surface of ulna at wrist  MUSCLES THAT FLEX PRONATORS/SUPINATORS I I I anterior and medial surfaces of anterolateral surfaces of distal portion Of pronates forearm and distal ulna radius hand medial rotation pronator quadratus by of radius at radioulnar joint medial epicondyle of humerus and middle of lateral surface of radius +hand pronates forearm of teres of by medial rotation pronator coronoid process ulna radius at radioulnar joints , plus flexion at elbow lateral epicondyle of humerus and anterolateral surface of radius distal to the supinates forearm and ridge near radial noten of ulna radial tuberosity hand by lateral rotation supinator of radius at radioulnar joints