External Cranium Face - Face Muscles

Question 1

Occipitofrontalis: Front Belly Origin

Answer 1

Epicranial aponeurosis

Question 2

Occipitofrontalis: Front Belly Insertion

Answer 2

Skin and subcutaneous tissue of eyebrows and forehead

Question 3

Occipitofrontalis: Front Belly Action

Answer 3

Elevates eyebrows and wrinkles skin of forehead; protracts scalp (indicating surprise or curiosity)

Question 4

Occipitofrontalis: Occipital Belly Origin

Answer 4

Lateral two thirds of superior nuchal line

Question 5

Occipitofrontalis: Occipital Belly Insertion

Answer 5

Epicranial aponeurosis

Question 6

Occipitofrontalis: Occipital Belly Action

Answer 6

Retracts scalp; increasing effectiveness of frontal belly

Question 7

Orbicularis Oculi Origin

Answer 7

Medial orbital margin; medial palpebral ligament; lacrimal bone

Question 8

Orbicularis Oculi Insertion

Answer 8

Skin around margin of orbit; superior and inferior tarsal plates

Question 9

Orbicularis Oculi Action

Answer 9

Closes eyelids: palpebral part does so gently; orbital part tightly (winking)

Question 10

Orbicularis Oris Origin

Answer 10

Medial maxilla and mandible; deep surface of perioral skin; angle of mouth (modiolus)

Question 11

Orbicularis Oris Insertion

Answer 11

Mucous membrane of lips

Question 12

Orbicularis Oris Action

Answer 12

Tonus closes oral tissue; phasic contraction comressess and protrudes lips (kissing) or resists distension (when blowing)

Question 13

Levator Labii Superioris Origin

Answer 13

Infra-orbital margin(maxilla)

Question 14

Levator Labii Superioris Insertion

Answer 14

Skin of upper lip

Question 15

Levator Labii Superioris Action

Answer 15

Part of dilators of mouth; retract (elevate) and /or evert upper lip; deepen nasolabial sulcus (showing sadness)

Question 16

Depressor Labii Inferioris Origin

Answer 16

Platysma and anterolateral body of mandible

Question 17

Depressor Labii Inferioris Insertion

Answer 17

Skin of lower lip

Question 18

Depressor Labii Inferioris Action

Answer 18

Part of dilators of mouth; (depresses) and/or everts lower lip (pouting, sadness)

Question 19

Zygomaticus Major Origin

Answer 19

Lateral aspect of zygomatic bone

Question 20

Zygomaticus Major Insertion

Answer 20

Angle of mouth (modiolus)

Question 21

Zygomaticus Major Action

Answer 21

Part of dilators of mouth; elevate labial commissure - bilaterally to smile (happiness); unilaterally to sneer (disdain)

Question 22

Risorius Origin

Answer 22

Parotid fascia and buccal skin (highly variable)

Question 23

Risorius Insertion

Answer 23

Angle of mouth (modiolus)

Question 24

Risorius Action

Answer 24

Part of dilators of mouth; depresses labial commissure bilaterally to frown (sadness)

Question 25

Depressor Anguli Oris Origin

Answer 25

Anterolateral base of mandible

Question 26

Depressor Anguli Oris Insertion

Answer 26

Angle of mouth (modiolus)

Question 27

Depressor Anguli Oris Action

Answer 27

Part of dilators of mouth; depresses labial commissure bilaterally to frown (sadness)

Question 28

Mentalis Origin

Answer 28

Body of mandible (anterior to roots of inferior incisors)

Question 29

Mentalis Insertion

Answer 29

Skin of chin (mentolabial sulcus)

Question 30

Mentalis Action

Answer 30

Elevates and protrudes lower lip; elevates skin of chin (showing doubt)

Question 31

Platysma Origin

Answer 31

Subcutaneous tissue of infraclavicular and supraclavicular regions

Question 32

Platysma Insertion

Answer 32

Base of mandible; skin of cheek and lower lip; angle of mouth (modiolus); orbicularis oris

Question 33

Platysma Action

Answer 33

Depresses mandible (against resistance); tenses skin of inferior face and neck (conveying tension and stress)

Question 34

Buccinator (cheek muscle) Origin

Answer 34

Mandible, alveolar processes of maxilla and mandible, pterygomandibular raphe

Question 35

Buccinator (cheek muscle) Insertion

Answer 35

Angle of mouth (modiolus); orbicularis oris`

Question 36

Buccinator (cheek muscle) Action

Answer 36

Presses cheek against molar teeth; works with tongue to keep food between occlusal surfaces and out of oral vestibule; resists distension (when blowing)