Muscles - Action Only

Question 1

buccinator

Answer 1

compresses cheeks

Question 2

risorius

Answer 2

draws corner of mouth laterally

Question 3

platysma

Answer 3

tenses skin of neck, depresses mandible

Question 4

depressor labii inferioris

Answer 4

depresses and helps evert lower lip

Question 5

inferior rectus (eye)

Answer 5

eye looks down

Question 6

superior rectus

Answer 6

eye looks up

Question 7

medial rectus

Answer 7

eye looks medially

Question 8

lateral rectus

Answer 8

eye looks laterally

Question 9

superior oblique

Answer 9

eye rolls, looks down and laterally

Question 10

inferior oblique

Answer 10

eye rolls, looks up and laterally

Question 11

sternothyroid

Answer 11

depresses hyoid bone and larynx

Question 12

erector spinae group

Answer 12

holds up spine

1. Spinalis
2. Longissimus
3. Iliocostalis

(I love spinach)

Question 13

External intercostals

Answer 13

elevate ribs

Question 14

internal intercostals

Answer 14

depress ribs

Question 15

scalene group

Answer 15

elevate ribs and/or flex neck

one side bends neck and rotates to the opposite side

Question 16

external anal sphincter

Answer 16

closes anal opening

Question 17

levator scapulae

Answer 17

elevates scapula

Question 18

pectoralis minor

Answer 18

depresses and protracts shoulder
rotates scapula so glenoid cavity moves inferiorly
elevates ribs if scapula is stationary

Question 19

Brachioradialis

Answer 19

flexion at elbow

Question 20

Pronator teres

Answer 20

pronates forearm and hand by medial rotation of radius at radioulnar joints, plus flexion at elbow

Question 21

Supinator

Answer 21

supinates forearm and hand by lateral rotation of radius at radioulnar joints

Question 22

Flexor carpi radialis

Answer 22

flexion and abduction at wrist

Question 23

Extensor carpi radialis

Answer 23

extension and abduction at wrist

Question 24

Abductor pollicis longus

Answer 24

abduction at joints of thumb and wrist

Question 25

Extensor digitorum

Answer 25

extension at finger joints and wrist

Question 26

Extensor indicis

Answer 26

extension and adduction at joints of index finger

Question 27

Flexor digitorum superficialis

Answer 27

flexion at proximal interphalangeal, metacarpophalangeal, and wrist joints

Question 28

Opponens pollicis

Answer 28

opposition of thumb

Question 29

Tensor fasciae latae

Answer 29

extension of the knee and lateral rotation of the leg acting through the iliotibial tract
abduction and medial rotation of thigh

Question 30

Piriformis

Answer 30

lateral rotation and abduction of hip

help to maintain stability and integrity of hip

Question 31

Adductor longus

Answer 31

adduction, flexion, and medial rotation at hip

Question 32

Gracilis

Answer 32

flexion and medial rotation at knee, adduction and medial rotation at hip

Question 33

Iliacus

Answer 33

flexion at the hip and, when working with the psoas major, flexes the intervertebral joints

Question 34

Psoas major

Answer 34

flexion at hip and/or lumber intervertebral joints

Question 35

Semimembranosus

Answer 35

flexion at knee

extension and medial rotation at hip

Question 36

Semitendinosus

Answer 36

flexion at knee

extension and medial rotation at hip

Question 37

Soleus

Answer 37

plantar flexion at ankle

postural muscle when standing

Question 38

Vastus lateralis/medialis

Answer 38

extension at knee

Question 39

Fibularis longus/brevis

Answer 39

eversion of foot and plantar flexion at ankle
supports ankle
supports longitudinal and transverse arches

Question 40

Flexor hallucis longus

Answer 40

flexion at joints of great toe

plantar flexes ankle

Question 41

Extensor digitorum longus

Answer 41

extension of toes 2-5

dorsiflexes ankle