The shoulder joint

Question 1

Flexion

Answer 1

Degrees: 0-90

Muscles:
Deltoid (anterior)
Pectoralis major

Question 2

Extension

Answer 2

Degrees: 0-45

Muscles:
Deltoid (posterior)
Teres major
Latissimus dorsi

Question 3

Internal rotation

Answer 3

Degrees: 0-40

Muscles: 
Teres major 
Latissimus dorsi 
Anterior deltoid
Pectoralis major 
Subscapularis

Question 4

External rotation

Answer 4

Degrees: 0-55

Muscles:
Teres minor
Posterior deltoid
Infraspinatus

Question 5

Adduction

Answer 5

Degrees: 0-45

Muscles:
Pectoralis major
Latissimus dorsi

Question 6

Abduction

Answer 6

Degrees: 0-180

Muscles:
Deltoid (all fibres) 
Serratus anterior (rotation of scapula)
Trapezius (rotation of scapula)
Supraspinatus

Question 7

Shoulder joint

Answer 7

Synovial ball and socket joint with multi axial movement

Question 8

Ligamentous stability in the shoulder

Answer 8

Anteriorly - glenohumeral ligament

Superiorly - coraco-humeral ligament

Superior protection - coraco-acromial ligament

Question 9

Coraco-acromial arch

Answer 9

Contents: supraspinatus tendon insertion + subacromial bursa

Inflammation causes a painful arc (60-120 degrees)

Question 10

Muscular stability in the shoulder

Answer 10

Supraspinatus - superior
Infraspintaus - posterior
Teres minor - posterior
Subscapularis - anterior