Movements of the Shoulder

Question 1

What muscles allow lateral rotation of the shoulder?

Answer 1

Infraspinatus

Teres minor

Question 2

Which muscles allow flexion of the shoulder?

Answer 2

Anterior part of the deltoid
Pectoralis major
Coracobrachialis
Biceps brachii

Question 3

Which muscles cause extension of the arm at the shoulder?

Answer 3

Teres major
Latissimus dorsi
Posterior part of the deltoid

Question 4

Which muscles cause abduction of the arm, and at which angles?

Answer 4

0 - 15* - supraspinatus
15 - 90* - deltoid (middle part)
over 90* - requires rotation of the scapula, via trapezius and serratus anterior

Question 5

Which muscles cause adduction of the arm?

Answer 5

Teres major
Latissimus dorsi
Pectoralis major

Question 6

Which muscles cause medial rotation of the shoulder?

Answer 6

Subscapularis
Pectoralis major
Latissimus dorsi
Teres major