Axial Muscles: Actions ONLY

Question 1

Frontalis

Answer 1

Raises eyebrows and wrinkles forehead

Question 2

Orbicularis Oculi

Answer 2

Closes eyes

Question 3

Zygomaticus

Answer 3

Raised corner of mouth; smiling muscles

Question 4

Depressor Anguli Oris

Answer 4

Pulls down corner of mouth; frowning muscle.

Question 5

Orbicular oris

Answer 5

Purses lips; kissing muscles

Question 6

Temporalis

Answer 6

Raises jaw;chewing action

Question 7

Masseter

Answer 7

Raises jaw; chewing action

Question 8

Buccinator

Answer 8

Holds food between teeth while chewing

Question 9

Pterygoid

Answer 9

Grinding side to side movements

Question 10

Suprahyiod Group
(Digastric, stylohyiod, mylohyiod, and heniohyoid)

Answer 10

Widen pharynx, close larynx (pulls hyoid up and toward mandible)

Question 11

Tensor veli palatini

Answer 11

Close nasal passage by elevating soft palate

Question 12

Levator veli palatini

Answer 12

Close nasal passage by elevating soft palate

Question 13

Pharyngeal constrictors

Answer 13

Propel food throught pharynx into esophagus

Question 14

Infrahyoid (sternohyoid, sternohyoid, omohyoid, thyrohyoid)

Answer 14

Return hyoid and larynx to pre-swallowing position

Question 15

Sternocleidomastoid

Answer 15

Flexion, lateral movement

Question 16

Scalene

Answer 16

Lateral movement

Question 17

Splenius (capitis and cervicus)

Answer 17

Extension

Question 18

Trapezius

Answer 18

Extension

Question 19

Erector spinae

Answer 19

Extension; if muscles on both sided of vertebral column contracted- spine and head are erect; if muscles on only one side are contracted- spine if bent laterally.

Question 20

Quadratus lumboris

Answer 20

Flexion

Question 21

Internal intercostals

Answer 21

Lower ribs and compress lungs (exhale)

Question 22

External intercostals

Answer 22

Raise ribs and expand lungs (inhale)

Question 23

Diaphragm

Answer 23

Contraction-moves down and expands thoracic cavity (inhale); Relaxation-moves up and compress thoracic cavity (exhalation)

Question 24

Internal oblique

Answer 24

Compresses abdomen; force respiration; some role flexion and rotation of spine.

Question 25

External oblique

Answer 25

Compresses and abdomen; force respiration; some role flexion and rotation of spine

Question 26

Transverse abdominus

Answer 26

Compresses abdomen; forced respiration; some role flexion and rotation of spine.

Question 27

Rectus abdominus

Answer 27

Flexion of spine; sit up muscle

Question 28

Levator ani & coccygeus

Answer 28

Elevate pelvic floor; prevent increased intraabdominal pressure

Question 29

External urethral and anal sphincters

Answer 29

Voluntary control urination or defecation

Question 30

Ischiocavernosus & Bulbospongiosus

Answer 30

Erection of penis or clitoris