1. Muscle of the Thorax and Abdomen

2.  Determine the anatomical movements indicated in the diagrams

3.  Pectoantebrachialis (not in humans)  Pectoralis major  Pectoralis minor  Xiphihumeralis (not in humans)

4.  NO HUMAN HOMOLOG  Origin:  manubrium (sternum)  Insertion:  fascia of forelimb near elbow  Action:  rotates forelimb and draws limb toward chest (adduction)

5.  Origin:  Clavicle, sternum, ribs 1-6  Insertion:  Greater tubercle of humerus  Action:  rotate forelimb and draw toward chest (adduction)

6.  Origin:  Sternum (xiphoid process)  Insertion:  Proximal half of humerus  Action:  Rotate forelimb and draw toward chest (adduction)

7.  NO HUMAN HOMOLOG  Origin:  Sternum (xiphoid process)  Insertion:  By narrow tendon near proximal end of humerus  Action:  Rotate forelimb and draw towards chest (adduction)

8.  Lattisimus dorsi  External obliques  Rectus abdominus

9. Largest muscle of the back  Origin:  Last 6 thoracic vertebrae, all lumbar vertebrae and iliac crest  Insertion:  Intertubercular groove (humerus)  Action:  Pulls forelimb dorsocaudally

10. Largest muscle of the back  Origin:  Last 6 thoracic vertebrae, all lumbar vertebrae and iliac crest  Insertion:  Intertubercular groove (humerus)  Action:  Pulls forelimb dorsocaudally

11. Paired superficial muscles that make up the lateral walls of the abdomen  Origin:  Lower ribs  Insertion:  Iliac crest  Action:  Trunk movement – flexion, ab compression, lateral rotation

12. Paired muscles deep to the external obliques  Origin:  Iliac crest  Insertion:  Last three ribs  Action:  Same as external obliques

13. Most superficial muscles of the abdomen; largest muscle of the abdomen  Origin:  pubis  Insertion:  Xiphoid process, Rib cage  Action:  Flex the vertebral column

14. Biology corner Human Muscles Pectoantebrachialis Pectoralis major Pectoralis minor Xiphihumeralis Lattisimus dorsi External obliques Rectus abdominus

15. Biology corner Human Muscles Teres Major Pectoralis Major Latissimus dorsi Serratus anterior External obliques Rectus abdominus

17. Muscle of the shoulder and upper forelimb

18.  Trapezius in humans  Region: shoulder  Action: pulls clavicle forward and upward, draws the scapula dorsally; allows forward extension of the humerus  Antagonists: rotator cuff, latissimus dorsi, pectoralis major, subscapularis  Origin:  Insertion:

19.  Deltoid in Humans  Location: Shoulder  Action: forward extension of the humerus, flexes the elbos  Antagonists: rotator cuff, latissimus dorsi, pectoralis major, subscapularis  Origin:  Insertion:

20.  Action:  Origin:  Insertion:

21. Muscle of the Shoulder and Forelimb: VENTRAL

22.  Action:  Origin:  Insertion:

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31.  Longus/brevis  Action:  Origin:  Insertion:

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33.  Communis/lateralis  Action:  Origin:  Insertion:

34. Muscle of the Shoulder and Forelimb: DORSAL

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40. Muscle of the Head and Neck

41.  Action:  Origin:  Insertion:

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44.  Action:  Origin:  Insertion:

45.  Sternomastoid/cleidomastoid  Action:  Origin:  Insertion: