Shoulder, abdominal

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created 5 years ago by Shelbymiller012
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updated 5 years ago by Shelbymiller012
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1

Pectoralis major

Origin- clavicle, sternum, cartilage of first 6 ribs

insertion- humerus

action- prime mover of arm flexion (adducts, medially, rotates arm)

2

Deltoid

Origin- clavical, scapula

insertion- humerus

action- prime mover of arm abduction

3

Rictus abdominis

Origin- pubis

insertion- sternum, costal cartilage of ribs 5-7

action- flexes and rotates vertebral column

4

External oblique

Origin- last 8 ribs

insertion- iliac crest

action- rectus abdominis, rotate and laterally flex the trunk

5

Internal oblique

Origin- iliac crest

insertion-costal cartilage of last 3 ribs

action- rectus abdominis, rotate and laterally flex the trunk

6

Transversus abdominis

Origin- iliac crest, cartilage of last 5or 6 ribs

insertion- pubis

action- compresses abdominal contents

7

Trapezium

Origin- occipital bone, clavical and thoracic vertebrae

insertion- scapula, clavical

action- raises, rotates and retracts scapula and stabilizes it

8

Latissiumus Dorsi

Origin- lower 3-4 ribs, inferior spine, iliac crest

insertion- proximal humerus

action- prime mover of arm extension; adducts and medially rotates arm

9

Coracobrachialis

Origin- scapula

insertion- humerus

action- Adduction, flexion and medial rotation

10

Supraspinatus

Origin- scapula

insertion- humerus

action- abducting arm

11

Teres minor

Origin- scapula

insertion- humerus

action- rotates arm outward

12

Teres major

Origin- scapula

insertion- humerus

action- Extention, adduction, medial arm rotation

13

Infraspinatus

Origin- scapula

insertion- humerus

action- rotates arm outward

14

Subscapularis

Origin- scapula

insertion- humerus

action- medial rotation