Muscles of Facial Expression

Question 1

the two functions of muscles within the scull

Answer 1

1. mastication- chewing

2. facial expression

Question 2

Facial expression muscle inervation

Answer 2

Cranial Nerve 7

-facial nerve

Question 3

Facial Muscles attach to:

Answer 3

1. skin
2. fascia
3. bone

Question 4

Occipitofrontalis -two bellied muscle

• tendon in the middle
• tendon-thin, sits on top of scull

Answer 4

• fontalis

- occipitalsis

Question 5

the tendon on the top of the head conecting the two bellies of the occipitofontalis, covering the supirior and lateral surfaces of the skull is called the:

Answer 5

• epicranial aponeurosis (collective term of muscle-above the cranium)
• galea aponeurotica (name of the tendon)
• apnoneurosis is a sheet like tenson

Question 6

Frontal Belly (frontalis) cause what movement?

Answer 6

• furrow eyebrows

- look serious

Question 7

Occipital Belly (occipitalis) causes what movenent?

Answer 7

• raising eyebrows

- surprise muscle

Question 8

Orbicularious Oculi- round, of the eye is refered to as what?

Answer 8

• blinking muscle

- contraction cloese the eye lids

Question 9

Orbicularious Oculi where does it originate?

Answer 9

-the entire eye orbit

Question 10

Orbicularious Oculi where does it insert?

Answer 10

onto the eye lids

Question 11

what type of muscle is the Orbicularious Oculi?

Answer 11

sphincter muscle- closes an orifices

Question 12

Zygomatic Major and Minor - stems othe zygomatic

insert where?

Answer 12

• the corner of the lips

Question 13

Zygomatic Major and Minor are called what?

Answer 13

the smiling muscles

Question 14

Risorius (laughing) none as the _____

Answer 14

whistling muscle

Question 15

Orbicularis oris circular sphincter muscle, around the mouth

known as?

Answer 15

• the kissing muscle

- purges lips, closes the mouth

Question 16

Risorius does what?

Answer 16

draws the corners of the mouth together, bring the cheeks towards the teeth (liek while whistling)

Question 17

Risorius originates off of?

Answer 17

-Fascia over parotid (salivary) gland

Question 18

Depressor anguli oris (depresses or lowers, angle or corner, of the mouth)
originates from where?

Answer 18

-mandible

Question 19

Depressor anguli oris incerts where?

Answer 19

the coner of the mouth

Question 20

Depressor anguli oris is refered to as…

Answer 20

the frowning muscle

-sad

Question 21

Platysma runs from where?

Answer 21

the mandible

Question 22

Platysma inserts on what?

Answer 22

pectoralis major muscles (chest muscle)

Question 23

Platysma is known as the?

Answer 23

shaving muscle

Question 24

Buccinator (buckle region- in the cheek)
-shares compartments (more important in chewing) but shares inervation with the facial muscle
allows for what movement?

Answer 24

-side to side motion of the mouth

Question 25

Buccinator orgin?

Answer 25

• just below the teeth

- just above the teeth

Question 26

Buccinator insertion?

Answer 26

-just above the mouth

Question 27

what is different about muscle attachment of facial expression muscle than other skelatal muscles?

Answer 27

facial muscles attach primarily to skin rather than bone

Question 28

Which is your “kissing” muscle? (You contract it to pucker your lips.)

Answer 28

orbicularis oris

Question 29

Which muscle do you use the most when smiling?

Answer 29

zygomaticus major

Question 30

Buccinator paired muscle, what does the contraction of one side do?

Answer 30

moves the jaw back and forth

Question 31

where does cranial nerve 7 exit the cranial cavity?

Answer 31

the inernal acoustic mutes

Question 32

where does the internal acoustic metus lead into?

Answer 32

the auditory canal, passage way through the temporal bone

Question 33

which passage in the audiotory canal does the facial nerve take to reach the outside of the skull?

Answer 33

stylomastoid foramen

-lies between the styloid process and the mastoid process

Question 34

once outside the stylomastoid forman the facial nerve is covered by what gland?

Answer 34

the parotid (salivary) gland

• just antior to the ear
• salivary gland that secreats jucies into the oral cavity
• starts chemical digestion
• facial nerve runs through and out of the gland

Question 35

how does the single cranial nerve inervate all the facial muscles?

Answer 35

-branches into 5 branches that spread across the face

Question 36

what happens when the parotid (salivary) gland becomes swollen? Bell’s Palsy

Answer 36

• its duct extends into the oral cavity, and we can take in alot of bacteria when we eat
• often only one will be infected at a time
• when infected the gland swells and puts pressure on the facial nerve that exists within the gland
• waking up in the morning with a droopy side of the face
• this is b/c they have taken on an infection and is puting pressure on the facial nerve and by doing so has inhibted it’s function, its ability to inervate the muscles of facial expression on one side of the face.
• too much pressur can hinder the finction of that nerve in the long term