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Head and Neck anatomy > Muscles of facial expression > Flashcards

Muscles of facial expression Flashcards

1
Q

What are the groups of muscles?

A
  1. Orbital group
  2. Nasal group
  3. Oral group
  4. Auricular group
  5. Occipitofrontalis
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2
Q

What are the muscles in the orbital group?

A
  1. Orbicularis oculi
  2. Corrugator supercilii
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3
Q

What is the function of orbicularis oculi?

A
  • Palpebral part: Closes eyelids gently
  • Orbital part: Closes eyelids forcefully
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4
Q

What is the function of corrugator supercilii?

A

Draws eyebrows medially and downwards

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5
Q

What are the muscles in the nasal group?

A
  1. Nasalis
  2. Procerus
  3. Depressor septi
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6
Q

What is the function of nasalis?

A
  • Transverse part: Compresses nasal aperture
  • Alar part: Opens nostrils
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7
Q

What is the function of procerus?

A

Draws down medial angles of eyebrows to create transverse wrinkes over bridge of nose

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8
Q

What is the function of depressor septi?

A

Pulls nose inferiorly

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9
Q

What are the muscles in the oral group?

A
  1. Depressor anguli oris
  2. Depressor labii inferioris
  3. Mentalis
  4. Risorius
  5. Zygomaticus major
  6. Zygomaticus minor
  7. Levator labii superioris
  8. Levator labii superioris alaeque nasi
  9. Levator anguli oris
  10. Orbicularis oris
  11. Buccinator
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10
Q

What is the function of depressor anguli oris?

A

Depresses corners of mouth

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11
Q

What is the function of depressor labii inferioris?

A

Draws lower lips down

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12
Q

What is the function of mentalis?

A

Raises and protrudes lower lips

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13
Q

What is the function of risorius?

A

Retracts corners of mouth (smiling)

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14
Q

What is the function of zygomaticus major?

A

Draws corners of mouth upwards and laterally

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15
Q

What is the function of zygomaticus minor?

A

Elevates upper lips

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16
Q

What is the function of levator labii superioris?

A

Elevates upper lips

17
Q

What is the function of levator labii superioris alaeque nasi?

A
  • Elevates upper lips
  • Opens nostrils
18
Q

What is the function of levator anguli oris?

A

Raises corners of mouth

19
Q

What is the function of orbicularis oris?

A
  • Closes lips
  • Protrudes lips
20
Q

What is the function of buccinator?

A

Presses cheeks against teeth and prevents buildup of food in oral vestibule

21
Q

What are the functions of the auricular muscles?

A

Movements of the ears (vestigial)

Head and Neck anatomy (18 decks)

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