Lec 3 Sphenoid

Question 1

What sits inside the sella turcica?

Answer 1

pituitary gland

Question 2

What branch of the trigeminal goes through the foramen ovale?

Answer 2

V3 - mandibular

Question 3

What goes through the superior orbital fissure?

Answer 3

• V1 (opthalmic)
• all nerves that move the eye (CN 3, 4, 6)
• sympathetics to eye
• vessels

Question 4

What branch of what cranial nerve supplies the temporalis, masseter, lateral pterygoid, and medial pterygoid?

Answer 4

V3 (mandibular branch) of trigeminal nerve (CN 5)

Question 5

What type of nerve fibers are in the V1 and V2 branches of the trigeminal?

Answer 5

sensory

Question 6

What is the order of the layers of the cranium?

Answer 6

Skin
Connective Tissue
Aponeurosis
Loose Connective Tissue
Pericranium

(SCALP)

Question 7

What cranial nerve comes from the stylomastoid foramen?

Answer 7

facial nerve (7)

Question 8

What are the branches of the facial nerve VII?

Answer 8

1. posterior auricular
2. temporal
3. zygomatic
4. buccal
5. marginal mandible
6. cervical

Question 9

What is the action of the corrugator supercilii?

Answer 9

draws eyebrow medially and inferiorly (worry or concern)

Question 10

What is the action of the procerus plus transverse part of nasalis?

Answer 10

depresses medial end of eyebrow (dislike)

Question 11

What is the action of the alar part of nasalis plus leveator labii superioris alaeque nasii?

Answer 11

depresses ala laterally, dilating anterior nasal aperture

Question 12

What is the action of the orbicularis oris?

Answer 12

tonus closes oral fissure; phasic contraction compresses and protrudes lips (kissing) or resist distension (blowing)

Question 13

What is the action of the levator labii superioris?

Answer 13

part of dilators of mouth; retract and/or evert upper lip; deepen nasolabial sulcus

Question 14

What is the action of the zygomaticus minor?

Answer 14

part of dilators of mouth; retract and/or evert upper lip; deepen nasolabial sulcus

Question 15

What is the action of the buccinator?

Answer 15

presses cheek against molar teeth; worsk with tongue to keep food between occlusal surfaces and out or oral vesituble; resists distension

Question 16

What is the action of the zygomaticus major?

Answer 16

part of dilators of mouth; elevate labial commissure-bilaterally to smile (happy); unilaterally to sneer (distain)

Question 17

What is the action of the levator anguli oris?

Answer 17

part of dilators of mouth; widens oral fissure, as when grinning or grimacing

Question 18

What is the action of the risorius?

Answer 18

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

Question 19

What is the action of the depressor anguli oris?

Answer 19

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

Question 20

What is the action of the depressor labii inferioris?

Answer 20

part of dilators of mouth; retracts and/or everts lower lip (sadness, pout)

Question 21

What is the action of the mentalis?

Answer 21

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

Question 22

What is the action of the platysma?

Answer 22

depresses mandible; tenses skin of inferior face and neck (tension and stress)

Question 23

What is the action of the front belly of the occipitofrontalis?

Answer 23

elevates eyebrowns and wrinkles skin of forehead; protracts scalp (suprise or curiosity)

Question 24

What is the action of the occiptial belly of the occipitofrontalis?

Answer 24

retracts scalp; increasing effectiveness of frontal belly

Question 25

What is the action of the orbicularis oculi?

Answer 25

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

Question 26

What muscle does the 1st branch of the facial nerve (posterior auricular branch) innervate?

Answer 26

occipital belly of the occipitofrontalis

Question 27

What muscles do the 2nd branch of the facial nerve (temporal branch) innervate?

Answer 27

- front belly of occipitofrontalis - orbicularis oculi - corrugator supercilii

Question 28

What muscle does the 3rd branch of the facial nerve (zygomatic branch) innervate?

Answer 28

orbicularis oculi

Question 29

What muscle does the 4th branch of the facial nerve (buccal branch) innervate?

Answer 29

- procerus plus transverse part of nasalis - alar part of nasalis plus levator labii superioris alaeque nasii - orbicularis oris - levator labii superioris - zygomaticus minor - buccinator - zygomaticus major - levator anguli oris - risorius

Question 30

What muscle does the 5th branch of the facial nerve (marginal mandibular) innervate?

Answer 30

- depressor anguli oris - depressor labii inferioris - mentalis

Question 31

What muscle does the 6th branch of the facial nerve ( cervical branch) innervate?

Answer 31

platysma

Question 32

What muscle demonstrates concern or worry?

Answer 32

corrugator supercilii

Question 33

What muscle conveys distain or dislike?

Answer 33

procerus plus transverse part of nasalis

Question 34

What muscle flares nostrils during anger or exertion?

Answer 34

alar part of nasalis plus levator labii superioris alaeque nasii

Question 35

What muscles shows sadness?

Answer 35

levator labii zygomaticus minor

Question 36

What muscle flexes bilaterally to smile and unilaterally to sneer?

Answer 36

zygomaticus major

Question 37

What muscle widens oral fissure to grin or grimace?

Answer 37

levator anguli oris

Question 38

What muscles frown/sadness?

Answer 38

depressor anguli oris risorius

Question 39

What muscle is pouting?

Answer 39

depressor labii inferoris

Question 40

What muscle shows doubt/pout?

Answer 40

mentalis

Question 41

What muscle conveys tension and stress?

Answer 41

platysma

Question 42

What muscle indicates surprise or curiosity?

Answer 42

occipitofrontalis

Question 43

What muscle is winking?

Answer 43

orbicularis oculi

Question 44

What muscle resists distension when blowing?

Answer 44

buccinator

Question 45

What muscle protrudes lips (kissing) or resists distension (blowing)?

Answer 45

orbicularis oris