Origin and Insertion

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  1. Deltoideus (acromiodeltoid, spinodeltoid)
    • origin: spine/acromion of scapula
    • insertion: deltoid tuberosity of humerus
    • action: flexes shoulder
  2. Infraspinatus
    • origin: infraspinous fossa of scapula
    • insertion: lateral side of greater tuberosity of humerus
    • action: flexes shoulder/abducts limb at the shoulder
  3. Supraspinatus
    • origin: supraspinous fossa of scapula
    • insertion: greater tuberosity of humerus
    • action: extends shoulder
  4. Subscapularis
    • origin: subscapular fossa of scapula
    • insertion: lesser tuberosity of humerus
    • action: adducts limb/rotates forearm medially
  5. Teres major
    • origin: caudal border of scapula
    • insertion: teres major tuberosity of humerus
    • action: flexes shoulder
  6. Triceps brachii (3 heads: long, medial, lateral)
    • origin: long head:caudal border of scapula/ medial&lateral: proximal border of humerus
    • insertion: olecranon of ulna
    • action: extends elbow/ flexes shoulder
  7. Biceps brachii
    • origin: supragelnoid tubercle of scapula
    • insertion: ulna and radial tuberosities¬†
    • action: flexes elbow/ extends shoulder
  8. Brachialis
    • origin: caudolateral aspect of proximal humerus
    • insertion: ulnar and radial tuberosities
    • action: flexes elbow
  9. lateral muscles of the scapula and shoulder
    • deltoids (acromiodeltoid, spinodeltoid)
    • infraspinatus muscle
    • supraspinatus muscle
  10. medial muscles of the shoulder
    • subscapularis muscle
    • teres major muscle
  11. cranial muscles of the arm
    • biceps brachii muscle
    • brachialis muscle
  12. caudal muscle of the arm
    triceps brachii muscle
  13. muscles that flex the shoulder
    • latissimus dorsi
    • deltoids (acromiodeltoid, spinodeltoid)
    • infraspinatus
    • teres major
    • triceps brachii¬†
  14. muscles that extend the shoulder
    • supraspinatus
    • biceps brachii
    • brachiocephalicus
  15. muscles that flex the elbow
    • biceps brachii
    • brachialis
  16. muscles that extend the elbow
    triceps brachii
Card Set
Origin and Insertion
lab 2
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