Head and neck muscle functions

Question 1

Buccinator muscle

Answer 1

Compresses cheeks

Question 2

Depressor lablill infeirioris

Answer 2

Depresses lower lip

Question 3

Levator labill superiloris

Answer 3

Elevates upper lip

Question 4

Mentalis

Answer 4

Elevates and protrudes lower lip

Question 5

Orbicularis Oris

Answer 5

Compresses, purse lips

Question 6

Risorius

Answer 6

Draws corner of mouth to the side

Question 7

Depressor anguli oris

Answer 7

Depress corner of mouth

Question 8

Zygomaticus major

Answer 8

Retracts and elevates corner of mouth

Question 9

Zygomaticus Minor

Answer 9

Retracts and elevates upper lip

Question 10

Corrugator supercilli

Answer 10

Pulls skin inferiorly and anteriorly, wrinkle brow

Question 11

Levator papebrae superloris

Answer 11

Elevate upper eyelid

Question 12

Orbicularis oculi

Answer 12

Close eye.

Question 13

Occipitofrontalis

Answer 13

Frontal belly: Raise eyebrows
Occipital belly: Tenses and retracts scalp

Question 14

Platysma

Answer 14

Tense skin of neck, depresses mandible

Question 15

Masseter

Answer 15

Elevates mandible and closes the jaw

Question 16

Temporalis

Answer 16

Elevates mandible

Question 17

Pterygoids

Answer 17

Medial: Elevates the mandible and closes the jaws, or performs lateral excursion.
Lateral: Opens jaws, protrudes mandible or performs lateral excursion.

Question 18

Cricothyroid

Answer 18

Lengthen and increase tension on vocal cords

Question 19

Sternocleidomastoid

Answer 19

Together: Flex head and neck
Individually: Laterally flex and rotate head

Question 20

Scalenes

Answer 20

Both: Stabilize neck and elevate ribs in respiration
Individually: Lateral flexion of neck

Question 21

Sternohyoid

Answer 21

Depress hyoid

Question 22

Omohyoid

Answer 22

Depress and retract hyoid

Question 23

Sternothyroid

Answer 23

Depress thyroid cartilage

Question 24

Thyrohyoid

Answer 24

Depress hyoid bone or elevate thyroid cartilage

Question 25

Stylohyoid

Answer 25

Raise and retract hyoid

Question 26

Digastricus

Answer 26

Anterior - open mouth Posterior - elevate hyoid

Question 27

Mylohyoid

Answer 27

Elevate floor of mouth and tongue

Question 28

Geniohyoid

Answer 28

Elevate hyoid and base of tongue

Question 29

Arytenoids (transverse and oblique)

Answer 29

Adduct vocal cords, closing glottis

Question 30

Lateral cricoarytenoids

Answer 30

Adduct vocal cords closing glottis

Question 31

Posterior cricoarytenoids

Answer 31

Abduct vocal cords opening glottis

Question 32

Thyroarytenoids

Answer 32

Shorten or relax vocal cords

Question 33

Vocalis

Answer 33

Shorten or relax vocal cords.