petoral region muscles origin insertion and action

2. ANATOMY
PECTORAL REGION
Muscles Origin and
Insertion:

3. PECTORALIS MAJOR
ORIGIN:
Clavivle,Sternum and Upper
six(6) costal cartilages.
INSERTION:
Lateral lip of biceptial groove of
humerous.
ACTION:
Adducts the arm and rotates it
medially,clavicular fibers also flex
arm.

4. ACTION:
Adduction of arm

5. ACTION:
Shoulder HORIZONTAL adduction

6. ACTION:
Medial rotation

7. PECTORALIS MINOR:
ORIGIN:
Third,Forth,and Fifth rib.
INSERTION:
Carocoid process of scapula.
ACTION:
Depresses point of shoulder;ifscapula is
fixed,it elevates the ribs of origin.

8. Muscle attachment
view:

9. ACTION:

10. ACTION:
Depresses point of shoulder. If scapula is fixed,elevates ribs origin.

11. SUBCLAVIUS:
ORIGIN:
First costal cartilage.
INSERTION:
Clavicle.
ACTION:
Depresses clavicle and steadies this bone
during the movement of shoulder girdle.

12. Muscle attachment
view:

13. SERATUS ANTERIOR:
ORIGIN:
Upper eight ribs.
INSERTION:
Medial border amd inferior angle of
scapula.
ACTION:
Depresses the forward anterior around
the thoracic wall;rotates scapula.

14. Muscle attachment
view:

15. ACTION:

16. THANKS FOR ATTENTION…