Shoulder Muscles

Question 1

Scapulothoracic (ST) Joint Elevator Muscles

Answer 1

Upper Trap, Levator Scapulae, Rhomboid Major & Minor

Question 2

Scapulothoracic (ST) Joint Depressor Muscles

Answer 2

Lower Trap, Latissimus Dorsi, Pec Minor, Subclavius

Question 3

Scapulothoracic (ST) Joint Protractor Muscle

Answer 3

Serratus Anterior

Question 4

Scapulothoracic (ST) Joint Retractor Muscles

Answer 4

Middle Trap, Rhomboids, Lower Trap

Question 5

Muscles used for Glenohumeral Joint Shoulder Elevation

Answer 5

Abduction= Middle Deltoid, anterior deltoid & supraspinatus
Flexion= Anterior Deltoid, coracobrachialis, Biceps Brachii (long head)

Question 6

Muscles used for Scapulothoracic (ST) Shoulder Elevation

Answer 6

Upward Rotators= Serratus Anterior, Upper Trap, Middle Trap, Lower Trap

**Middle trap has smallest moment arm

Question 7

Muscles used for Shoulder Adduction & Extension (GHJ)

Answer 7

Latissimus dorsi, Pec Major, Teres Major!! long head of triceps, posterior deltoid, infraspinatus, teres minor

Question 8

Muscles used for Shoulder Adduction & Extension (STJ)

Answer 8

Rhiomboids, Latissimus Dorsi

Question 9

Muscles used for Internal Rotation (1.75x greater torque than ER)

Answer 9

Subscapularis, Anterior Deltoid, Pectoralis Major, Latissimus Dorsi, Teres Major

Question 10

Muscles used for External Rotation

Answer 10

Infraspinatus, Teres Minor, Posterior Deltoid