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Anatomy > FACE I > Flashcards

FACE I Flashcards

1
Q

Muscles of facial expression are innervated by which nerve?

A

By the facial nerve CN VII

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2
Q

What four parts does the orbicularis oculi consist of?

A
  1. palpebral part
  2. orbital part.
  3. muscle of Riolan
  4. lacrimal part
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3
Q

What is the function of the palpebral part? How does it do this?

A

closes the eyelid gently as in sleep and blinking to keep the cornea from drying out.

Closes the palpebral fissure in a lateral to medial direction and so assists in spreading the tears across the cornea.

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4
Q

The orbital part attaches to what part?

A

Overlies the orbital rim and attaches to the frontal bone and maxilla

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5
Q

What are the two functions of the orbital part?

A
  1. forcefully closes the eye as in winking and squinting in bright lights to protect the eyeball against glare and dust.
  2. depresses the eyebrow to reduce excessive light from entering.

Moves the eyebrows down and medially.

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6
Q

Where is the muscles of Riolan located?

A

fine group of palpebral fibers at margin of upper and lower lid

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7
Q

What is the function of the muscle of riolan?

A

help keep the lid margins up against the eyeball (whether eyelids are opened or closed) with fibers of the palpebral part of orbicullaris oculli

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8
Q

The orbicularis oris are arranged where?

A

muscle fiber circularly arranged around the mouth and insert into the mucous membrane of the lips

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9
Q

the orbicularis oris’s function. (5)

A
  1. closes the lips (not the same as closing the mouth)
  2. compresses the lips against the teeth and thereby helps keep food between the teeth during mastication
  3. compresses the lips and protrudes the lips during whistling, sucking, or kissing
  4. used to puff out your cheeks
  5. It is important for speech
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10
Q

The buccinator is what part of the mouth?

A

thin, flat, rectangular muscle of the cheek

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11
Q

What are the functions of the buccinator? (4)

A
  1. ) presses cheek against the molar teeth so that food is held between the teeth while chewing and to prevent food from being stuck in the gutter between cheek and gums
  2. ) keeps the cheek taut preventing it from being injured while chewing
  3. ) When the cheeks are filled with air, buccinator compresses the cheeks to expel the air between the lips as when blowing on a wind instrument
  4. ) Used when whistling or sucking by forcing the cheeks against the teeth.
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12
Q

the smile and frown muscles are all innervated by which nerve?

A

The facial nerve

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13
Q

The frontalis muscle is part of which face part?

A

scalp

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14
Q

What is the function of the frontallis muscle?

A

raises the eyebrows and wrinkles the skin of the forehead

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15
Q

What arteries supply blood to the scalp?

A

branches of external carotid artery and branches of the opthalmic artery

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16
Q

What are the branches of the external carotid artery?

A
  1. occipital artery
  2. posterior auricular artery
  3. superficial temporal artery
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17
Q

What are the branches of the opthalmic artery?

A

supraorbital artery and supratrochlear artery

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18
Q

The facial nerve exits the skull through which foramen?

A

Stylomastoid foramen

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19
Q

Where had the CN VII passes through?

A

It has passed through the internal auditory meatus to enter the petrous part of the temporal bone.

20
Q

Where do most of the motor branches of the facial nerve pass forward?

A

In the parotid gland

21
Q

Injury to the facial muscles will produce weakness, paralysis on which side?

A

The same side

22
Q

Where could a virus or tumor be located to compress the facial nerve? (7)

A
  1. infection or swollen parotid gland
  2. tumor by the internal auditory meatus foramen inside the skull or virus or tumor by the stylomastoid foramen on the inferior surface
  3. mass or tumor in the posterior cranial fossa
  4. blunt force trauma leading to fracture of petrous part of temporal bone
  5. middle ear infection called otis media
  6. facial or surgical wounds
  7. lyme disease
23
Q

What is it called when you rule out all of the 7 symptons/signs?

A

Bell’s palsy

24
Q

READ PAGE 286

A

286

25
Q

If the frontalis muscle is not functioning what signs would be noticed?

A

cant raise eyebrows, and no wrinkle in forehead

26
Q

If the orbicularis oculi of the orbital part was not functioning what signs would you see.

A

eyebrows cant go down. Cant close eyelids really tightly (try to pry eyes open and doesnt work)

27
Q

If the orbicularis oculi palpebral part was not functioning what signs would you see?

A

cant close eyelids gently
cant blink to spread tears, cant close eyelids at all
will have dry eyes (might have to tape lids)

28
Q

The orbicullaris oculi, muscle of Riolan was not functioning what would hapen?

A

cant hold eyelid against eyeball so you get eversion. Outward, so can see conjuctiva on the inside of the lid. Clinically called etropian.

29
Q

What would happen if the buccinator was no functionting. What signs would you see?

A

food would get lodged between cheek and gum. Might bite on your cheek more often. Dont have ability to expel air

30
Q

What would happen if the orbicularis oris muscle was not functioning, what signs would you see?

A

Cant close lips tightly. Food wont stay in mouth. If they puff out their cheeks, they cant do it equally on both sides.

31
Q

What would happen if the Zygomaticus major muscle was not functioning, what signs would you see?

A

cant smile

32
Q

What would happen if the risorius muscle was not functioning, what signs would you see?

A

cant smile

33
Q

What would happen if the levator anguli oris muscle was not functioning, what signs would you see?

A

cant smile

34
Q

What would happen if the depressor anguli oris muscle was not functioning, what signs would you see?

A

cant frown

35
Q

read page 290

A

botox injections

36
Q

the facial artery is a branch of which artery?

A

external carotid artery

37
Q

the facial artery gives of which branches

A

lips (superior and inferior labial artery)
lateral aspect of the nose (lateral nasal artery)
terminates as the angular artery (medial aspect of the eye)

38
Q

go through the vein pathways

A

pg 293

39
Q

What kind of a vein is the IOF

A

emissary vein. connects the dural venous sinuses to a vein on the outside of the skull

40
Q

do veins of the head and neck have valves? What does this mean?

A

No they do not. This means that infections in the face could be carried to the orbit or cavernous sinus. A blood borne infection can flow in any direction.

41
Q

What is the danger area of the face?

A

corners of the mouth to the bride of the nose.

42
Q

the facial vein drains what?

A

the upper lip

43
Q

the angular vein drains what?

A

the side of the nose

44
Q

deep cervical lymph nodes lie along which vein in the neck?

A

the internal jugular vein

45
Q

Medial canthus of eye, medial 1/2 of eyelids & conjuctiva flows in where? Where does that flow into?

A

submandibular lymph node —-> deep cervical nodes

46
Q

Lateral canthus of eye, lateral 1/2 of eyelids & conjuctiva flows in where? Where does that flow into?

A

preauricular lymph nodes ——> deep cervical lymph nodes

Anatomy (13 decks)

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