Axial Muscles (Primary Movement)

Question 1

epicranius: frontalis

Answer 1

raises eyebrows

Question 2

epicranius: occipitalis

Answer 2

fixes aponeurosis and pulls scalp posteriorly

Question 3

orbicularis oculi

Answer 3

closes eyelid

Question 4

levator palpebrae superioris

Answer 4

opens upper eyelid

Question 5

corrugator supercilii

Answer 5

draws eyebrows together and inferiorly (frown)

Question 6

orbicularis oris

Answer 6

closes lips (kissing)

Question 7

zygomaticus major

Answer 7

raises corner of muth upwards (smiling)

Question 8

buccinator

Answer 8

compresses cheek (whistling & trumping)

Question 9

platysma

Answer 9

tenses skin of neck (growling/pouting)

Question 10

superior rectus

Answer 10

elevates eye and turns it medially

Question 11

inferior rectus

Answer 11

depresses eye and turns it medially

Question 12

medial rectus

Answer 12

moves eye medially

Question 13

lateral rectus

Answer 13

moves eye laterally

Question 14

superior oblique

Answer 14

depresses eye and turns it laterally

Question 15

inferior oblique

Answer 15

elevates eye and turns it laterally

Question 16

temporalis

Answer 16

closes jaw

Question 17

masseter

Answer 17

prime mover of jaw closure (chewing)

Question 18

pterygoids:medial

Answer 18

aids in grinding movements of teeth

Question 19

pterygoids:lateral

Answer 19

aids in grinding movements of teeth

Question 20

tongue

Answer 20

speaking and chewing

Question 21

stermocleidomastoid

Answer 21

flexes and laterally rotates head

Question 22

splenius capitis

Answer 22

extend or hyperxtend head

Question 23

diaphragm

Answer 23

prime mover of inspiration

Question 24

intercostals (external)

Answer 24

elevates rib cage

Question 25

intercostals (internal)

Answer 25

depresses rib cage

Question 26

scalenes

Answer 26

elevates ribs 1-2 (aids in inspiration)

Question 27

external oblique

Answer 27

flex spine, rotate trunk, flex laterally, compress viscera

Question 28

internal oblique

Answer 28

flex spine, rotate trunk, flex laterally, compress viscera

Question 29

transverse abdominus

Answer 29

compresses abdominal contents

Question 30

rectus abdominis

Answer 30

flexes and rotates vertebral column (sit-ups)

Question 31

erector spinae

Answer 31

prime mover of spine extension

Question 32

quadratus lumborum

Answer 32

flexes vertebral column laterally - core muscle that forms most of posterior abdominal wall and is most often "pulled"