Muscles of Scalp and Face

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LECTURE 3

Last updated 11:05 AM on 5/3/26
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30 Terms

1
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where are facial muscles located?

subcutaneous tissue

2
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why are facial muscles often fused together?

common origins in embryology

3
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where do facial muscles insert?

onto the skin, they pull on skin to exert their effects.

4
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what are the 4 actions of facial muscles?

  • dilators

  • sphincters

  • elevators

  • depressors

5
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how are facial muscles innervated?

the motor branch of the facial nerve CNVII

6
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what are the bellies of the occipitofrontalis muscle

x2 occipital bellies

x2 frontal bellies

7
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what is the primary function of the occipital belly?

it will retract the scalp (pulls scalp back)

8
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what is the function of the frontal belly?

  • it will raise the eyebrows

  • wrinkle forehead

  • protract the scalp

9
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what does the glabellar region describe?

the area between the eyebrows

10
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what is the function of corrugator supercilli?

  • brow lowerer

  • forms the 11 lines

11
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what is the function of procerus?

  • brow lowerer

  • wrinkles the skin of the nose

12
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what is the function of depressor supercilli?

works alongside procureus

13
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what are the 2 parts of orbicularis oculi?

  • palpebral (inner)

  • orbital (outer)

14
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what is the function of orbicularis oculi?

  • eyelid closer

  • squint

  • cheek raise

15
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what are the 4 muscles of the nasal region?

  • Nasal ( alar and transverse)

  • depressor septi nasi

  • dilator naris anterior

  • LLSAN (levator labii superioris alaeque nasi)

<ul><li><p>Nasal ( alar and transverse)</p></li><li><p>depressor septi nasi</p></li><li><p>dilator naris anterior </p></li><li><p>LLSAN (levator labii superioris alaeque nasi)</p></li></ul><p></p><p></p>
16
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which muscles flare the nostrils?

  • nasalis - alar

  • depressor septi nasi

  • LLSAN

  • dilator naris anterior

17
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which muscle compresses the nose?

nasalis - transverse

18
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what is the function of LLSAN alone?

  • snarl muscle

  • nose wrinkler

<ul><li><p>snarl muscle </p></li><li><p>nose wrinkler</p></li></ul><p></p>
19
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what are the 2 actions of the oral muscles?

  • sphincter - orbicularis oris

  • dilators

20
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<p>what are the muscles of the oral region?</p>

what are the muscles of the oral region?

  • Orbicularis Oris

  • Levator Labii Superioris

  • Zygomaticus Minor

  • Zygomaticus Major

  • Levator Anguli Oris

  • Buccinator, Risorius

  • Depressor Anguli Oris

  • Depressor Labii Inferioris

  • Mentalis

**LLSAN

21
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what is the action of orbicularis oris?

  • kissing

  • closing lips

<ul><li><p>kissing </p></li><li><p>closing lips </p></li></ul><p></p>
22
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what is the action of mentalis

chin raiser

<p>chin raiser</p>
23
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what is the action of depressor anguli oris?

  • frowning '

  • depresses the angles of the mouth

<ul><li><p>frowning '</p></li><li><p>depresses the <strong>angles of the mouth</strong></p></li></ul><p></p><p></p>
24
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what is the action of depressor labii superioris?

  • depresses lower lip

  • pulls laterally

<ul><li><p>depresses lower lip </p></li><li><p>pulls laterally</p></li></ul><p></p>
25
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what is the action of risorius?

pulls angle of the mouth outwards and backwards.

<p>pulls angle of the mouth outwards and backwards. </p>
26
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what is the action of buccinator?

  • like risorius

  • trumpeters muscle

<ul><li><p>like risorius </p></li><li><p>trumpeters muscle</p></li></ul><p></p>
27
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what is the action of zygomaticus major?

  • smile muscle

  • dimples cheeks

<ul><li><p>smile muscle</p></li><li><p>dimples cheeks</p></li></ul><p></p>
28
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what is the function of zygomaticus minor?

  • nasolabial deepener

  • creates a furrow above the upper lip

<ul><li><p>nasolabial deepener </p></li><li><p>creates a furrow above the upper lip</p></li></ul><p></p>
29
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what is the action of levator anguli oris?

  • sharp lip puller

  • smile with lips

<ul><li><p>sharp lip puller </p></li><li><p>smile with lips </p></li></ul><p></p>
30
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what is the action of LLSAN?

  • upper lip raiser

  • disgust