Muscle Actions

Question 1

The lateral pterygoid, supra hyoid, and infra hyoid all _ the _ joint.

Answer 1

. . . All DEPRESS the TEMPRO-MANDIBULAR joint

Question 2

The _, _ and _ pterygoid all elevate the temporomandibular joint.

Answer 2

The TEMPORALIS, MASSETER, and MEDIAL pterygoid all elevate the . . .

Question 3

The masseter, lateral pterygoid, and medial pterygoid all _ the temporomandibular joint

Answer 3

. . All PROTRUDE the temporomandibular joint

Question 4

_ of the TMJ is caused by the temporalis, masseter, and digastric muscles

Answer 4

RETRUSION of the TMJ is caused by . . .

Question 5

Side to side movement of the TM joint occurs due to the _ _, _ _, _ and _ muscles.

Answer 5

Side to side movement of the TM joint occurs due to the LATERAL PYTERGOID, MEDIAL PYTERGOID, TEMPORALIS, and MASSETER muscles.

Question 6

Name the 3 movements that the lateral pterygoid produces? Medial pterygoid? (3)

Answer 6

Lateral: (DiPS)
-Depress*, protrusion, side to side

Medial: (PEnS)

• protrude, elevate*, side to side
• =specific to muscle

Question 7

The Masseter assists with which 4 movements of the TMJ?

Answer 7

PERSon

-Protrusion, elevate, retrusion, side to side

Question 8

The _ and _ muscles are responsible for C/S flexion, rotation and lateral bending.

Answer 8

The STERNOCLEIDOMASTOID and SCALENE muscles are responsible . . .

Question 9

The C/S flexes due to activation of _, _ _ and _ muscles.

Answer 9

Flexes due to activation of STERNOCLEIDOMASTOID, LONGUS COLLI, and SCALENES muscles

Question 10

The _ _, _ _, _ and _ _ assist with extension, rotation and lateral bending of the cervical spine.

Answer 10

The SPLENIUS CERVICIS, ILIOCOSTALIS CERVICIS, MULTIFIDUS and LONGISSIMUS CERVICIS assist with . . .

Question 11

Splenius cervicis, longissimus cervicis, _ _, iliocostalis cervicis, _ and _ all assist with cervical spine extension.

Answer 11

Splenius cervicis, longissimus cervicis, SEMISPINALIS CERVICIS, iliocostalis cervicis, MULTIFIDUS and TRAPEZIUS all assist with . . .

Question 12

Sternocleidomastoid, scalenes, Splenius cervicis, longissimus cervicis, iliocostalis cervicis, multifidus, and _ _ all assist with rotation and lateral bending.

Answer 12

. . . Multifidus, and LEVATOR SCAPULAE all assist with rotation and lateral bending.

Question 13

Which 3 muscles assist in flexion of the T/S and L/S?

Answer 13

IRE

• Internal oblique
• rectus abdominus
• external oblique

Question 14

Which 3 muscles assist in T/S and L/S extension?

Answer 14

• erector SPINAE
• Quadratus lumborum
• Multifidus

Question 15

Psoas major, QL, external and internal obliques, Multifidus, longissimus Thoracis, and rotatores all assist in T/S and L/S _ and _ _.

Answer 15

. . . All assist in T/S and L/S ROTATION and LATERAL BENDING

Question 16

Upper trapezius and levator scapulae assist with scapular _.

Answer 16

. . .assist with scapular ELEVATION

Question 17

Latissimus dorsi, pectoralis Major and minor, and lower trapezius assist in scapular _.

Answer 17

. . . Assist in scapular DEPRESSION

Question 18

Scapular protraction is produced by _ _ and _ _. Scapular retraction is produced by _ _ and _.

Answer 18

Scapular protraction- SERRATUS ANTERIOR AND PECTORALIS MINOR

Scapular Retraction- MIDDLE TRAPEZIUS and RHOMBOIDS.

Question 19

Upward rotation of the scapula is produced by the _ and _ _ and the _ _ muscles.

Answer 19

Upward rotation of the scapula is produced by the UPPER and LOWER TRAPEZIUS, and the SERRATUS ANTERIOR muscles.

Question 20

_, _ _, and _ _ assist with downward rotation of the scapula.

Answer 20

RHOMBOIDS, LEVATOR SCAPULAE, and PECTORALIS MINOR all assist with downward rotation of the scapula.

Question 21

What are the 3 muscle actions that occur at the scapula from pec minor?

Answer 21

PDD

• protraction
• depression
• downward rotation

Question 22

What movements at the scapula is SERRATUS anterior responsible for? (2)

Answer 22

Protraction and upward rotation

Question 23

The lower traps assist with _ _ and _. The LEVATOR scapulae muscles assist with _ _ and _.

Answer 23

Lower traps: depression and upward rotation

Levator scapulae: elevation and downward rotation

Question 24

What action are the anterior deltoid, coracobrachialis, pec major (clavicular head), and biceps brachii responsible for at the shoulder joint?

Answer 24

FLEXION

Question 25

What action do middle deltoid and supraspinatus perform at the shoulder?

Answer 25

ABDUCTION

Question 26

Shoulder extension is performed by the _ _, _ _, teres _, and _ _.

Answer 26

Extension is performed by the LATISSIMUS DORSI, POSTERIOR DELTOID, teres MAJOR, and TRICEPS BRACHII (long head).

Question 27

Shoulder Adduction is performed by the _ _, _ _ and teres _ muscles.

Answer 27

Adduction is performed by the PECTORALIS MAJOR, LATISSIMUS DORSI, and teres MAJOR muscles.

Question 28

The posterior deltoid, infraspinatus and teres minor all perform _ _ at the shoulder joint.

Answer 28

. . . All perform HORIZONTAL ABDUCTION at the shoulder joint

Question 29

Horizontal adduction of the shoulder is performed by _ _ and _ _.

Answer 29

Horizontal adduction is performed by the ANTERIOR DELTOID and PECTORALIS MAJOR

Question 30

External or lateral rotation of the shoulder is performed by _ _, _ and _ _.

Answer 30

ER of the shoulder is performed by POSTERIOR DELTOID, INFRASPINATUS, and TERES MINOR.

Question 31

Subscapularis, teres major, pec major, latissimus dorsi and anterior Deltoid all act as _ or _ _ at the shoulder.

Answer 31

. . . All act as MEDIAL or INTERNAL rotators AT THE SHOULDER JOINT

Question 32

Which 3 muscles flex the elbow? Extend the elbow (2)?

Answer 32

Flex the elbow -biceps brachii, brachioradialis, brachialis Extend the elbow -triceps brachii, anconeus

Question 33

Which 2 muscles perform elbow supination? Elbow pronation?

Answer 33

Supination -supinator and biceps brachii Pronation -pronator teres and pronator quadratus

Question 34

What 3 muscles flex the wrist joint?

Answer 34

Flexor carpi Radialis Flexor carpi ulnaris Palmaris longus

Question 35

Which 3 muscles extend the wrist?

Answer 35

Extensors carpi Radialis brevis and longus | Extensors carpi ulnaris

Question 36

Which 5 muscles assist in radial deviation? Which 2 assist in ulnar deviation?

Answer 36

Radial (FEEEE) -flexor carpi Radialis, extensor carpi Radialis brevis and longus, and extensor pollicis longus and brevis Ulnar -flexor carpi ulnaris, extensor carpi ulnaris

Question 37

Which 5 muscles perform finger flexion?

Answer 37

Flexor digitorum profundus and superficialis Flexor digiti minimi Interossei Lumbricals

Question 38

Which 3 muscles extend the fingers?

Answer 38

Extensor digitorum (AKA extensor digitorum communis) Extensor digiti minimi Extensor indicis

Question 39

Which 2 muscles perform finger abduction? Which ones assists with adduction of the fingers?

Answer 39

Abduction -dorsal interossei and abductor digiti minimi Adduction -palmar interossei

Question 40

Which 3 muscles flex the thumb? Extend the thumb?

Answer 40

Flex - flexor pollicis brevis and longus - opponens pollicis Extend - extensor pollicis brevis and longus - abductor pollicis longus

Question 41

Which 2 muscles perform thumb abduction? Which 1 performs thumb Adduction?

Answer 41

ABduction -abductor pollicis brevis and longus ADDuction -Adductor pollicis

Question 42

Which 4 muscles perform thumb opposition?

Answer 42

Opponens pollicis Opponens digiti minimi Flexor pollicis brevis Abductor pollicis brevis

Question 43

Which motion is performed by the Iliopsoas, sartorius, rectus femoris, and pectineus muscles?

Answer 43

Hip flexion

Question 44

Which 5 muscles assist with hip extension?

Answer 44

Gluteus medius and Maximus Semitendinosis Semimembranosis Biceps femoris

Question 45

Which action does gluteus medius and minimus, piriformis, Obturator internus and TFL all assist with?

Answer 45

Hip ABDUCTION

Question 46

Which 4 muscles assist in hip Adduction?

Answer 46

Adductor Magnus, longus and brevis | Gracilis

Question 47

TFL, Gluteus medius and minimus, pectineus, and adductor longus all assist with which movement?

Answer 47

Medial (Internal) rotation

Question 48

Gluteus Maximus, Obturator internus and externals, piriformis, gemellus superior and inferior and sartorius all assist with?

Answer 48

All assist with lateral rotation/ ER

Question 49

Which muscle is both and IR and an ER depending upon the amount of hip flexion?

Answer 49

Piriformis

Question 50

Biceps femoris, semitendinosis, semimembranosis and sartorius all assist with _ _.

Answer 50

. . . All assist with KNEE FLEXION

Question 51

Which 4 muscles perform knee extension?

Answer 51

Rectus Femoris | Vastus lateralis, medialis and intermedius

Question 52

Tibialis posterior, gastrocnemius, Soleus, peroneus/ Fibularis longus and brevis, plantaris and flexor hallucis all assist with _ _.

Answer 52

All assist with PLANTAR FLEXION

Question 53

Which 4 muscles perform Dorsiflexion of the ankle?

Answer 53

PETE - peroneus/ Fibularis tertius - extensor hallucis longus - tibialis anterior - extensor digitorum longus

Question 54

Which 3 muscles perform ankle inversion? Which 3 perform eversion?

Answer 54

Inversion -tibialis posterior and anterior, flexor digitorum longus Eversion -peroneus/ Fibularis longus, brevis, and tertius

Question 55

What are the 5 muscles that flex the toes? What are the 2 muscles that flex the big toe?

Answer 55

Toe flexion -flexor digitorum brevis and longus, flexor digiti minimi brevis, quadratus plantae, lumbricals Big toe flexion -flexor hallucis longus and brevis

Question 56

What 3 muscles perform toe extension? Which 2 perform big toe extension?

Answer 56

Toe extension -extensor digitorum longus and brevis, lumbricals Big Toe extension -extensor hallucis longus and brevis

Question 57

Which 2 muscles assist with toe abduction? Which 1 with toe Adduction?

Answer 57

Toe ABducton -abductor digiti minimi, dorsal interossei Toe ADDuction -plantar interossei

Question 58

Which muscles perform big toe abduction? Adduction?

Answer 58

ABduction -abductor hallucis ADDuction -adductor hallucis