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Head & Neck Anatomy > Lec 3 Sphenoid > Flashcards

Lec 3 Sphenoid Flashcards

1
Q

What sits inside the sella turcica?

A

pituitary gland

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2
Q

What branch of the trigeminal goes through the foramen ovale?

A

V3 - mandibular

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3
Q

What goes through the superior orbital fissure?

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

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

A

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

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5
Q

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

A

sensory

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6
Q

What is the order of the layers of the cranium?

A

Skin
Connective Tissue
Aponeurosis
Loose Connective Tissue
Pericranium

(SCALP)

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7
Q

What cranial nerve comes from the stylomastoid foramen?

A

facial nerve (7)

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8
Q

What are the branches of the facial nerve VII?

A
  1. posterior auricular
  2. temporal
  3. zygomatic
  4. buccal
  5. marginal mandible
  6. cervical
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9
Q

What is the action of the corrugator supercilii?

A

draws eyebrow medially and inferiorly (worry or concern)

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10
Q

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

A

depresses medial end of eyebrow (dislike)

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11
Q

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

A

depresses ala laterally, dilating anterior nasal aperture

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12
Q

What is the action of the orbicularis oris?

A

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

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13
Q

What is the action of the levator labii superioris?

A

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

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14
Q

What is the action of the zygomaticus minor?

A

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

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15
Q

What is the action of the buccinator?

A

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

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16
Q

What is the action of the zygomaticus major?

A

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

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17
Q

What is the action of the levator anguli oris?

A

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

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18
Q

What is the action of the risorius?

A

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

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19
Q

What is the action of the depressor anguli oris?

A

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

20
Q

What is the action of the depressor labii inferioris?

A

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

21
Q

What is the action of the mentalis?

A

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

22
Q

What is the action of the platysma?

A

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

23
Q

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

A

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

24
Q

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

A

retracts scalp; increasing effectiveness of frontal belly

25
Q

What is the action of the orbicularis oculi?

A

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

26
Q

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

A

occipital belly of the occipitofrontalis

27
Q

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

A
  • front belly of occipitofrontalis
  • orbicularis oculi
  • corrugator supercilii
28
Q

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

A

orbicularis oculi

29
Q

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

A
  • 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
30
Q

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

A
  • depressor anguli oris
  • depressor labii inferioris
  • mentalis
31
Q

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

32
Q

What muscle demonstrates concern or worry?

A

corrugator supercilii

33
Q

What muscle conveys distain or dislike?

A

procerus plus transverse part of nasalis

34
Q

What muscle flares nostrils during anger or exertion?

A

alar part of nasalis plus levator labii superioris alaeque nasii

35
Q

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

A

orbicularis oris

35
Q

What muscles shows sadness?

A

levator labii
zygomaticus minor

36
Q

What muscle resists distension when blowing?

A

buccinator

36
Q

What muscle flexes bilaterally to smile and unilaterally to sneer?

A

zygomaticus major

37
Q

What muscle widens oral fissure to grin or grimace?

A

levator anguli oris

38
Q

What muscles frown/sadness?

A

depressor anguli oris
risorius

39
Q

What muscle is pouting?

A

depressor labii inferoris

40
Q

What muscle shows doubt/pout?

41
Q

What muscle conveys tension and stress?

42
Q

What muscle indicates surprise or curiosity?

A

occipitofrontalis

43
Q

What muscle is winking?

A

orbicularis oculi

Head & Neck Anatomy (11 decks)

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