UE Muscle Actions

Question 1

Masseter

Answer 1

TMJ elevation, protrusion, retrusion, side to side

Question 2

Temporalis

Answer 2

TMJ elevation, depression, retrusion, side to side

Question 3

Suprahyoid and infrahyoid

Answer 3

TMJ depression

Question 4

Medial pterygoid

Answer 4

TMJ elevation, protrusion, side to side

Question 5

Lateral pterygoid

Answer 5

TMJ protrusion, side to side, depression

Question 6

Digastric

Answer 6

TMJ retrusion

Question 7

Sternocleidomastoid

Answer 7

Contralateral rotation, ipsilateral side bending, flexion

Question 8

Longus colli

Answer 8

Neck flexion

Question 9

Scalenus

Answer 9

Neck flexion, rotation/side bending

Question 10

Multifidus

Answer 10

Cervical extension, cervical rotation & side bending, thoracolumbar extension and rotation and side bending

Question 11

Splenius cervicis, semispinalis cervicis, iliocostalis cervicis, longissimus cervicis

Answer 11

Cervical extension, rotation, lateral bending - semispinalis cervicis does not rotate or side bend

Question 12

Rectus abdominus

Answer 12

Thoracolumbar flexion

Question 13

Internal/external obliques

Answer 13

Thoracolumbar flexion, rotation, side bending

Question 14

Erector spinae

Answer 14

Thoracolumbar extension

Question 15

Quadratus lumborum

Answer 15

Thoracolumbar extension, rotation, and side bending

Question 16

Longissimus and iliocostalis thoracis

Answer 16

Thoracic rotation and side bending

Question 17

Rotatores

Answer 17

Thoracolumbar rotation and side bending

Question 18

Upper trapezius

Answer 18

Scapular elevation, upward rotation, neck extension

Question 19

Middle trapezius

Answer 19

Scapular Retraction

Question 20

Lower trapezius

Answer 20

Scapular depression, upward rotation

Question 21

Levator scapulae

Answer 21

Scapular elevation, cervical side bending

Question 22

Serratus anterior

Answer 22

Scapular protraction, upward rotation

Question 23

Pectoralis major

Answer 23

Scapular depression, shoulder adduction, shoulder flexion (clavicular head), shoulder internal/medial rotation, horizontal adduction

Question 24

Pectoralis minor

Answer 24

Scapular protraction, scapular depression, downward rotation

Question 25

Rhomboids

Answer 25

Scapular retraction, downward rotation

Question 26

Latissimus dorsi

Answer 26

Scapular depression, shoulder extension, shoulder adduction, internal/medial rotation

Question 27

Anterior deltoid

Answer 27

Shoulder flexion, horizontal adduction,

Question 28

Middle deltoid

Answer 28

Shoulder abduction

Question 29

Posterior deltoid

Answer 29

Shoulder extension, horizontal abduction, external/lateral rotation

Question 30

Coracobrachialis

Answer 30

Shoulder flexion and adduction

Question 31

Biceps brachii

Answer 31

Shoulder flexion, elbow flexion, supination

Question 32

Supraspinatus

Answer 32

Shoulder abduction

Question 33

Teres major

Answer 33

Shoulder extension, adduction, internal/medial rotation,

Question 34

Triceps brachii

Answer 34

Shoulder extension (long head), elbow extension

Question 35

Infraspinatus

Answer 35

Horizontal abduction, external/lateral rotation

Question 36

Teres minor

Answer 36

Horizontal abduction, external/lateral rotation

Question 37

Subscapularis

Answer 37

Internal/medial rotation

Question 38

Brachialis

Answer 38

Elbow flexion

Question 39

Brachioradialis

Answer 39

Elbow flexion

Question 40

Anconeus

Answer 40

Elbow extension

Question 41

Supinator

Answer 41

Supination

Question 42

Pronator teres

Answer 42

Pronation

Question 43

Pronator quadratus

Answer 43

Pronation

Question 44

Flexor carpi radialis

Answer 44

Wrist flexion, radial deviation

Question 45

Flexor carpi ulnaris

Answer 45

Wrist flexion, ulnar deviation

Question 46

Palmaris longus

Answer 46

Wrist flexion

Question 47

Extensor carpi radialis longus and brevis

Answer 47

Wrist extension, radial deviation

Question 48

Extensor carpi ulnaris

Answer 48

Wrist extension, ulnar deviation

Question 49

Extensor pollicus longus and brevis

Answer 49

Wrist radial deviation, thumb extension

Question 50

Flexor digitorum profundus and superficialis

Answer 50

Finger flexion

Question 51

Dorsal interossei

Answer 51

Finger flexion, abduction

Question 52

Palmar interossei

Answer 52

Finger flexion, adduction

Question 53

Lumbricals

Answer 53

Finger flexion

Question 54

Opponens pollicis

Answer 54

Thumb flexion, opposition

Question 55

Extensor pollicis longus and brevis

Answer 55

Thumb extension

Question 56

Abductor pollicis longus

Answer 56

Thumb extension, thumb abduction

Question 57

Abductor pollicis brevis

Answer 57

Thumb abduction, opposition

Question 58

Adductor pollicis

Answer 58

Thumb adduction