Muscle movement shoulder summarised

Question 1

Abduction of shoulder

Answer 1

First 15 degrees; supraspinatus
15-90 - deltoid
90+ - scapulothoracic joint (trapezius upper fibres and serratus anterior)

Question 2

Adduction of shoulder

Answer 2

Pectoralis major sternal head
Latissimus dorsi
Teres major

Question 3

Flexion of shoulder

Answer 3

Anterior deltoid fibres
Coracobrachilais
Biceps brachii

Question 4

Extension of shoulder

Answer 4

Posterior deltoid fibres
Latissimus dorsi
Teres major

Question 5

Internal rotation of shoulder

Answer 5

Subscapularis
Teres major
Pectoralis major sternal head
Latissimus dorsi

Question 6

External rotation of shoulder

Answer 6

Infraspinatus

Teres minor