Muscles of the shoulder girdle

  1. Muscles connecting the upper limb to the vertebral column
    • Trapezius
    • Latissimus Dorsi
    • Levator Scapulae
    • Rhomboideus major and minor
  2. Muscles connecting the scapula to the humerus
    • Deltoid
    • Teres major
    • Rotator cuff muscles: suprispinatus, infraspinatus, teres minor, subscapularis
  3. Muscles of the arm, anterior compartment
    • coracobrachialis
    • biceps brachii
    • brachialis
  4. muscles of the arm, posterior compartment
    • triceps brachii
    • anconeus
  5. Trapezius
    O: Medial 1/3 of sup. nuchal line, EOP, ligamentum nuchae, SP of C7-T12

    I: Lateral 1/3 of clavicle, acromion proccess and spine of scapula

    V: Accesory nerve (CNXI) cervical nerve (C3, C4)
  6. Latissimus Dorsi
    O: SP of T7-S5 via thoracolumbar fascia, post. illiac crest, ribs 10-12, inf. angle of scapula

    I: floor of bicipetal groove, med. lip of bicipetal groove

    V: Thoracodorsal n (C(6), 7, 8)
  7. Levetor Scapulae
    O: post. tubercles of TVP of C1-C4

    I: med. border of scapula sup. to spine

    • V: Dorsal scapular n (C5)
    • cervical n (C3, C4)
  8. Rhombodeus minor, major
    O: Minor: SP of C7-Ti, Major: SP of T2-T5

    I: Med. border of scapula (minor: root and up, Major, below)

    V: Dorsal scapula n (C5)
  9. Deltoid
    O: Lat. 1/3 of clavicle, inf. border ofacromion process and spine of scapula

    I: Deltoid tuberosity

    V: Axillary nerve (C5, 6)
  10. Teres major
    O: lower 1/3 of lat. border of scapula, across inf. angle to medial border, exclding tip

    I: medial lip of bicipetal groove (crest of lesser tubercle

    V: suprascapular nerve (C 5, 6)

    note: in through the axilla
  11. Supraspinatus
    O: supraspinous fossa

    I: sup. facet of greater tubercle, joint capsule

    V. suprascapular nerve (C5, 6)
  12. Infraspinatus
    O: Infraspinous fossa

    I: middle facet of greater tubercle, joint capsule

    V. Suprascapular (C5, 6)
  13. Teres Minor
    O: lat. border of scapula (post. surface, sup. 2/3)

    I. inf. facet of greater tubercle, joint capsule

    V. axillary nerve (C5, 6)
  14. Subscapularis
    O. subscapular fossa

    I. lesser tubercle of humerus, joint capsule

    V. upper and lower subscapular nerves (C5,6)
  15. Pectoralis Major
    • O: Clavicular head: Ant. surface of med. half of clavicle
    • Sternocostal head: Ant. surface of sternum and costal cartilage of ribs 1-6
    • Abdominal head: Aponeurosis of external obliques

    I: Lat. lip of intertubercular sulcus and crest of greater tubercle of humerus

    V: Lateral and medial pectoral nerves (C5-7, C8-T1)
  16. Pectoralis Minor
    O: Ribs 3-5

    I: Coracoid process of scapula, medial surface

    V: Medial pectoral n (C8-T1)
  17. Serratus anterior
    O: Ribs 1-8 or 9

    I: Ant. surface of med. border of scapula and inf. angle

    V: Long thoracic nerve (C5-C8)
  18. Subclavius
    O: 1st rib and costal cartilage

    I: Subclavian groove of clavicle

    V: Nerve to subclavius (C5, 6)
  19. Coracobrachialis
    O: Coracoid process (w/sh. head of biceps brachii)

    I: Middle of med. shaft of humerus

    V: Musculocutaneous n (C5-C7)
  20. Biceps Brachii
    • O: Sh. head: coracoid process of scapula
    • L. head: Supraglenoid tubercle of scapula

    I: Radial tuberosity and bicipetal aponeurosis of radius

    V: Musculocutaneous n (C5-7)
  21. Brachialis
    O:Distal 1/2 of ant. shaft of humerus

    I: Coronoid process and ulnar tuberosity

    V: Musculocutaneous n (C5-7)
  22. Triceps Brachii
    • O: Long head: Infraglenoid tubercle of scapula
    • Lateral head: Lateral and posterior surface of humerus, superior to radial groove
    • Medial head: Posterior surface of humerus, inf. to radial groove

    I: Olecranon process of ulna

    V: Radial n (C5-T1)
  23. Anconeus
    O:Lat. epicondyle of humerus, post. surface

    I: olecranon proccess and prox. post. shaft of ulna

    V: Radial n (C5-T1)
Card Set
Muscles of the shoulder girdle
lecture 6 notes