Arm/Forearm

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Author:
gflip1287
ID:
46183
Filename:
Arm/Forearm
Updated:
2010-10-31 01:55:36
Tags:
Arm forearm
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Description:
Arm and forearm
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  1. Pectoralis major
    Origin: Cartilages of ribs 2-6, body of sternum, and inferior, medial portion of clavicle

    Insertion: Crest of greater tubercle and lateral lip of intertubercular groove of humerus

    Action: Flexion, adduction, and meical rotation at shoulder
  2. Latissimus dorsi
    Origin: Spinous processes of inferior thoracic and all lumbar vertebrae, ribs 8-12, and thoracolumbar fascia

    Insertion: Floor of intertubercular groove of the humerus

    Action: Extension adduction, and medial rotation at shoulder
  3. Deltoid
    Origin: Clavicle, acromion process and spine of scapula

    Insertion: Deltoid tuberosity of humerus

    Action: Abduction at shoulder; flexion and medial rotation; extension and lateral rotation
  4. Supraspinatous
    Origin: Supraspinous fossa of scapula

    Insertion: Greater tubercle of humerus

    Action: Abduction at shoulder
  5. Infraspinatous
    Origin: Infraspinous fossa of scapula

    Insertion: Greater tubercle of humerus

    Action: Lateral rotation at shoulder
  6. Teres major
    Origin: Inferior angle of scapula

    Insertion: Intertubercular groove of humerus

    Action: Extension, adduction, and medial rotation at shoulder
  7. Teres minor
    Origin: Lateral border of scapula

    Insertion: Greater tubercle of humerus

    Action: Lateral rotation at shoulder
  8. Subscapularis
    Origin: Subscapular fossa of scapula

    Insertion: Lesser tubercle of humerus

    Action: Medial rotation at shoulder
  9. Coracobrachialis
    Origin: Coracoid process of the scapula

    Insertion: Medial margin of shaft of humerus

    Action: Adduction and flexion at shoulder
  10. FOREARM (ANTEBRACHIUM)
  11. Biceps brachii (short head)
    Origin: Coracoid process of the scapula

    Insertion: Radial tuberosity

    Action: Flexion at elbow and shoulder; Supination
  12. Biceps brachii (long head)
    Origin: Supraglenoid tuberle of the scapula

    Insertion: Radial tuberosity

    Action: Flexion at elbow and shoulder; supination
  13. Brachialis
    Origin: Anterior, distal surface of humerus

    Insertion: Ulnar tuberosity

    Action: Flexion at elbow
  14. Brachioradialis
    Origin: Lateral supracondylar ridge of humerus

    Insertion: Lateral aspect of styloid process of radius

    Action: Flexion at elbow
  15. Triceps brachii (Lateral head)
    Origin: Superior, lateral margin of humerus

    Insertion: Olecranon process of ulna

    Action: Extension at elbow
  16. Triceps brachii (Long head)
    Origin: Infraglenoid tubercle of scapula

    Insertion: Olecranon process of ulna

    Action: Extension at elbow; Extension and adduction at the shoulder
  17. Triceps brachii (Medial head)
    Origin: Posterior surface of humerus, inferior to radial groove

    Insertion: Olecranon process

    Action: Extension at elbow
  18. Anconeus
    Origin: Posterior, inferior surface of lateral epicondyle of humerus

    Insertion: Lateral margin of olecranon process on ulna

    Action: Extension at elbow
  19. Pronator quadratus
    Origin: Anterior and medial surfaces of distal portion of ulna

    Insertion: Anterolateral surface of distal portion of radius

    Action: Pronation
  20. Pronator teres
    Origin: Medial epicondyle of humerus and coronoid process of ulna

    Insertion: Midlateral surface of radius

    Action: Pronation
  21. Supinator
    Origin: Lateral epicondyle of humerus, annular ligament, and ridge near radial notch of ulna

    Insertion: Anterolateral surface of radius a distal to the radial tuberosity

    Action: Supination
  22. Flexor carpi radialis
    Origin: Medial epicondyle of humerus

    Insertion: Bases of second and thirs MC

    Action: Flexion and abduction at wrist
  23. Flexor carpi ulnaris
    Origin: Medial epicondyle of humerus; adjacent medial surface of olecranon and anteromedial portion of ulna

    Insertion: Pisiform, hamate, and base of 5th MC

    Action: Flexion and adduction at wrist
  24. Palmaris longus
    Origin: Medial epicondyle of humerus

    Insertion: Palmar aponeurosis and flexor retinaculum

    Action: Flexion at wrist
  25. Extensor carpi radialis
    Origin: Lateral supracondylar ridge of humerus

    Insertion: Base of 2nd MC

    Action: Extension and abduction at wrist
  26. Extensor carpi radialis brevis
    Origin: Lateral epicondyle of humerus

    Insertion: Base of 3rd MC

    Action: Extension and abduction at wrist
  27. Extensor carpi ulnaris
    Origin: Lateral epicondyle of humerus; adjacent dorsal surface of ulna

    Insertion: Posterior surfaces of phalanges 2-5

    Action: Extension and adduction at wrist
  28. HANDS and FINGERS
  29. Extensor digitorum
    Origin: Lateral epicondyle of humerus

    Insertion: Posterior surfaces of phalanges 2-5

    Action: Extension at finger joint and wrist

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