Shoulder Muscle Actions

Question 1

Supraspinatus

Answer 1

Abduction of humerus

Question 2

Infraspinatus

Answer 2

ER, Adduction, Extension of humerus

Question 3

Teres Minor

Answer 3

ER, Adduction of humerus

Question 4

Subscapularis

Answer 4

IR, Flex, extend, adduct/abduct humerus

Question 5

Teres Major

Answer 5

IR, Adduction, Extension of humerus

Question 6

Biceps Brachii

Answer 6

Elbow flexion, shoulder flexion, supination

Question 7

Triceps Brachii

Answer 7

Elbow extension, shoulder extension

Question 8

Pectoralis Major

Answer 8

Flexion and Adduction of humerus

Question 9

Anterior Deltoid

Answer 9

Flexion, Horizontal adduction, IR, adduction of GH joint

Question 10

Middle Deltoid

Answer 10

Abduction of GH joint

Question 11

Posterior Deltoid

Answer 11

Extension, horizontal abduction, ER, abduction of GH

Question 12

Coracobrachialis

Answer 12

Flexion, Adduction of GH joint

Question 13

Pectoralis Minor

Answer 13

Depression and Anterior tilt of scapula

Question 14

Trapezius

Answer 14

upper: elevation
middle: retraction
lower: depression

Question 15

Serratus Anterior

Answer 15

Protraction, abduction, upward rotation of scapula

Question 16

Rhomboids

Answer 16

Retraction, elevation, downward rotation

Question 17

Levator Scapulae

Answer 17

Elevation, downward rotation of scapula

Question 18

Brachialis

Answer 18

Elbow flexion

Question 19

Brachioradialis

Answer 19

Elbow flexion

Question 20

Pronator Teres

Answer 20

Radioulnar pronator and Elbow flexion

Question 21

Anconeus

Answer 21

Elbow extension

Question 22

Supinator

Answer 22

Radioulnar supinator

Question 23

Pronator Teres

Answer 23

Radioulnar pronation, Elbow flexion

Question 24

Pronator Quadratus

Answer 24

Radioulnar pronation