Shoulder (glenohumeral joint)

Question 1

Flexion (antagonists on extension)

Answer 1

• Deltoid (anterior fibers)
• Pectoralis major (upper fibers)
• Biceps brachii
• Coracobrachialis

Question 2

Extension (antagonists on flexion)

Answer 2

• Deltoid (posterior fibers)
• Latissimus dorsi
• Teres major
• Pectoralis major (lower fibers)
• Triceps brachii (long head)

Question 3

Horizontal abduction (antagonist on h. adduction)

Answer 3

• Deltoid (posterior fibers)

Question 4

Horizontal adduction (antagonist on h. abduction)

Answer 4

• Deltoid (anterior fibers)
• Pectoralis major (upper fibers)

Question 5

Abduction (antagonist on adduction)

Answer 5

• Deltoid (all fibers)
• Supraspinatus

Question 6

Adduction (antagonist on abduction)

Answer 6

• Latissimus dorsi
• Teres major
• Infraspinatus
• Teres minor
• Pectoralis major (all fibers)
• Triceps brachii (long head)
• Coracobrachialis

Question 7

Lateral rotation (external rotation) (antagonists on medial rotation)

Answer 7

• Deltoid (posterior fibers)
• Infraspinatus
• Teres minor

Question 8

Medial rotation (internal rotation) (antagonists on lateral rotation)

Answer 8

• Deltoid (anterior fibers)
• Latissimus dorsi
• Teres major
• Subscapularis
• Pectoralis major (all fibers)