-
Orbicularis Oris
- origin-manubrium
- insertion-lips
- action-controls lips
-
sternocleidomastoid
- origin-manubrium, medial 1/3 of clavicle
- insertion-mastoid process, occipital bone
- aciton-flexion and lateral flexion of neck
-
rectus abdominus
- origin-pubic crest, symphasis
- insertion-xyphoid process
- action-flexion of vertebral column
-
external oblique
- origin-external surfaces of inferior 8 ribs
- insertion-pubic and iliac crest
- action-rotation and lateral flexion of trunk
-
pectoralis major
- origin-medial half of clavicle, sternum
- insertion-lateral lip of intertubercular groove on humerus
- action-flextion, medial rotation, adduction of arm
-
latissimus dorsi
- origin-spinous processes of vertebrae (T6-12), iliac crest
- insertion-intertubercular groove of humerus
- action-extension, adduction,medial rotation of arm
-
trapezius
- origin-posterior surface of occipital bone
- insertion-lateral 1/3 of clavicle, acromion
- action-elevate, retract, depress scapula
-
deltoid
- origin-lateral third of clavicle, acromion
- insertion-deltoid tuberosity of gumerus
- action-medial rotation, flexion, abduction of arm
|
|
