MSK: Muscle Actions

Question 1

Temporomandibular depression

Answer 1

Lateral pterygoid
Suprahyoid
Infrahyoid

Question 2

Temporomandibular elevation

Answer 2

Temporalis
Masseter
Medial pterygoid

Question 3

Temporomandibular protrusion

Answer 3

Masseter
Lateral pterygoid
Medial pterygoid

Question 4

Tempormandibular retrusion

Answer 4

Temporalis
Masseter
Digastric

Question 5

Temporomandibular side to side motion

Answer 5

Medial pterygoid
Lateral pterygoid
Masseter
Temporalis

Question 6

Cervical flexion

Answer 6

SCM
Longus colli
Scalene muscles

Question 7

Cervical extension

Answer 7

Splenius cervicis
Semispinalis cervicis
Iliocostalis cervicis
Longissimus cervicis
Multifidis
Trapezius

Question 8

Cervical rotation and lateral flexion

Answer 8

SCM
Scalenes
Splenius cervicis
Longissimus cervicis
Iliocostalis cervicis
Levator scapulae
Multifidis

Question 9

Thoracic/lumbar flexion

Answer 9

Rectus abdominis
Internal/external oblique

Question 10

Thoracic/lumbar extension

Answer 10

Erector spinae
Quadratus lumborum
Multifidis

Question 11

Thoracic/lumbar rotation and lateral flexion

Answer 11

Psoas major
Quadratus lumborum
External/internal oblique
Multifidis
Longissimus thoracis
Iliocostalis thoracic
Rotatores

Question 12

Scapular elevation

Answer 12

Upper trapezius
Levator scapulae

Question 13

Scapular depression

Answer 13

Latissimus dorsi
Pectoralis major
Pectoralis minor
Lower trapezius

Question 14

Scapular protraction

Answer 14

Serratus anterior
Pectoralis minor

Question 15

Scapular retraction

Answer 15

Rhomboids
Middle trapezius

Question 16

Scapular upward rotation

Answer 16

Serratus anterior
Upper and lower trapezius

Question 17

Scapular downward rotation

Answer 17

Rhomboids
Levator scapulae
Pectoralis minor

Question 18

Shoulder flexion

Answer 18

Anterior deltoid
Pectoralis major
Coracobrachialis
Biceps brachii

Question 19

Shoulder extension

Answer 19

Latissimus dorsi
Posterior deltoid
Teres major
Triceps brachii

Question 20

Shoulder abduction

Answer 20

Middle deltoid
Supraspinatus

Question 21

Shoulder adduction

Answer 21

Latissimus dorsi
Teres major
Pectoralis major

Question 22

Shoulder horizontal abduction

Answer 22

Posterior deltoid
Infraspinatus
Teres minor

Question 23

Shoulder horizontal adduction

Answer 23

Pectoralis major
Anterior deltoid

Question 24

Shoulder external rotation

Answer 24

Infraspinatus
Teres minor
Posterior deltoid

Question 25

Shoulder internal rotation

Answer 25

Pectoralis major Teres major Latissimus dorsi Anterior deltoid Subscapularis

Question 26

Elbow flexion

Answer 26

Biceps brachii Brachioradialis Brachialis

Question 27

Elbow extension

Answer 27

Triceps brachii Anconeus

Question 28

Radioulnar supination

Answer 28

Biceps brachii Supinator

Question 29

Radioulnar pronation

Answer 29

Pronator teres Pronator quadratus

Question 30

Wrist flexion

Answer 30

Flexor carpi radialis Flexor carpi ulnaris Palmaris longus

Question 31

Wrist extension

Answer 31

Extensor carpi radialis longus Extensor carpi radialis brevis Extensor carpi ulnaris

Question 32

Wrist radial deviation

Answer 32

Extensor carpi radialis longus/brevis Flexor carpi radialis Extensor pollicis longus/brevis

Question 33

Wrist ulnar deviation

Answer 33

Extensor carpi ulnaris Flexor carpi ulnaris

Question 34

Finger flexion

Answer 34

Flexor digitorum profundus/superficialis Flexor digiti minimi Interossei Lumbricals

Question 35

Finger extension

Answer 35

Extensor digitorum communis Extensor indicis Extensor digiti minimi

Question 36

Finger abduction

Answer 36

Dorsal interossei Abductor digiti minimi

Question 37

Finger adduction

Answer 37

Palmar interossei

Question 38

Thumb flexion

Answer 38

Flexor pollicis longus/brevis Opponens pollicis

Question 39

Thumb extension

Answer 39

Extensor pollicis longus/brevis Abductor pollicis longus

Question 40

Thumb abduction

Answer 40

Abductor pollicis longus/brevis

Question 41

Thumb adduction

Answer 41

Adductor pollicis

Question 42

Thumb opposition

Answer 42

Opponens pollicis Flexor pollicis brevis Abductor pollicis longus Opponens digiti minimi

Question 43

Hip flexion

Answer 43

Iliacus Psoas major Rectus femoris Sartorius Pectineus

Question 44

Hip extension

Answer 44

Gluteus maximus Semitendinosus Semimembranosus Biceps femoris

Question 45

Hip abduction

Answer 45

Gluteus medius Gluteus minimis TFL Obturator internus Piriformis

Question 46

Hip adduction

Answer 46

Adductor longus/brevis/magnus Gracilis

Question 47

Hip internal rotation

Answer 47

TFL Gluteus medius Gluteus minimus Pectineus Adductor longus

Question 48

Hip external rotation

Answer 48

Obturator externus Obturator internus Gluteus maximus Piriformis Gemelli Sartorius

Question 49

Knee extension

Answer 49

Rectus femoris Vastus medialis Vastus lateralis Vastus intermedius

Question 50

Knee flexion

Answer 50

Biceps femoris Semitendinosus Semimembranosus Sartorius

Question 51

Ankle PF

Answer 51

Gastrocnemius Soleus Tibialis posterior Peroneus longus/brevis Plantaris Flexor hallucis

Question 52

Ankle DF

Answer 52

Tibialis anterior Extensor hallucis longus Extensor digitorum longus Peroneus tertius

Question 53

Ankle inversion

Answer 53

Tibialis posterior/anterior Flexor digitorum longus

Question 54

Ankle eversion

Answer 54

Peroneal longus/brevis/tertius

Question 55

Toe flexion

Answer 55

Flexor digitorum longus/brevis Flexor hallucis longus/brevis Flexor digiti minimi Quadratus plantae Lumbricals

Question 56

Toe extension

Answer 56

Extensor hallucis longus/brevis Extensor digitorum longus/brevis Lumbricals

Question 57

Toe abduction

Answer 57

Abductor hallucis Abductor digiti minimi Dorsal interossei

Question 58

Toe adduction

Answer 58

Adductor hallucis Plantar interossei