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anat 316 > Nose and Sinuses and Muscles of Facial expression > Flashcards

Nose and Sinuses and Muscles of Facial expression Flashcards

1
Q

what is the function of the nasal cavity?

A

to humidify, warm and filter air
to facilitate drainage of the paranasal sinuses
to secrete mucus

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2
Q

what bones of the viscerocranium make up the nasal cavity?

A

nasal bone, vomer bone, maxillary bone, palatine bone, inferior nasal concha

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3
Q

what bones of the neurocranium make up the nasal cavity?

A

frontal bone, ethmoid bone, and the sphenoid bone

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4
Q

what is the nasal septum made out of?

A

bony portion and a cartilaginous portion (ethmoid and vomer bones, septal cartilage)

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5
Q

What is the function of the nasal septum?

A

to split the nose into L and R

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5
Q

with regards to the nasal cavity - what is a meatus?

A

space btw the conchae

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6
Q

what bone forms the superior and middle nasal conchae

A

the ethmoid bone

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7
Q

what is the function of the nasal conchae?

A

to increase surface area of the nasal cavity, to humidify air, to filter air, and to warm up air

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8
Q

what bones make up the roof of the nasal cavity?

A

the roof of the nasal cavity is made up of the cribiform plate of the ethmoid bone, the nasal bone, the frontal bone, and the sphenoid bone

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9
Q

what bones make up the floor of the nasal cavity

A

the palatine bone and the maxillary bones

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9
Q

what cartilages make up the external nose?

A

lateral nasal cartilage, major alar cartilage, and minor alar cartilage

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10
Q

what are the paranasal sinuses?

A

cavities (air pockets) found in the skull

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11
Q

which bones contain paranasal sinuses?

A

the ethmoid bone, the frontal bone, the maxillary bone, and the sphenoid bone contain paranasal sinuses

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12
Q

what are paranasal sinuses lined with?

A

respiratory mucosa and secrete mucous

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13
Q

what is the function of the paranasal sinuses?

A

to lighten the weight of the skull, to humidify/heat/filter air, and to secrete mucus

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14
Q

where do the paranasal sinuses drain into?

A

the nasal meatuses

15
Q

where does the superior meatus drain?

A

sphenoid and posterior ethmoid sinuses

16
Q

what does the middle meatus drain into?

A

frontal, anterior ethmoid, and maxillary sinuses

17
Q

what innervates the paranasal sinuses

A

the V1 (opthalamic) and the V2 (maxillary) branches of the trigeminal nerve

18
Q

where do facial muscles originate from?

A

facial bones or adjacent muscles

18
Q

what innervates the facial muscles?

A

CN7

19
Q

what is the basic function of ALL facial muscles?

A

to act as sphincters and dialators and to alter facial expression

20
Q

what are the 7 muscles of facial expression

A

frontalis, corrugator supercilii, orbicularis oculi, the zygomaticus, the buccinator, the orbicularis oris, and the platysma
FK OZ BOP

21
Q

what is the function of the frontalis?

A

draw the scalp back, raise eyebrows

22
Q

what are the three parts of the orbicularis oculi and where are they?

A

orbital part (above and below eye) palpebral part (upper and lower eyelid) lacrimal part (medial, compresss lacrimal sac)

23
Q

what is the function of the orbital part of the orbicularis oculi?

A

tightly closing eyes

23
Q

what is the function of the palpebral part of the orbicularis oculi?

A

losely closing eyes

24
Q

what is the function of the lacrimal part of the orbicularis oculi?

A

to compress the lacrimal sac

25
Q

what is the function of the corrugator surpercilii?

A

to draw the eyebrows medially and inferiorkly

26
Q

what is the function of the orbicularis oris?

A

purse and protrude ips

27
Q

what is the function of the zygomaticus?

A

to pull corners of the mouth up and draw it laterally

28
Q

what is the function of the buccinator?

A

to pull the cheeks inward against the teeth

29
Q

what is CN7’s intercranial pathway

A

brain stem - internal acoustic meatus - facial canal - medial wall of the middle ear - stylomastoid foramen

30
Q

what is the function of the platysma

A

to pull corners of mouth downs

31
Q

what do the temporal branches of the facial nerve innervate?

A

upper half orbicularis oculi, corrugator supercilli, frontalis

32
Q

what does the zygomatic branch of the facial nerve innervate?

A

oribuclaris oculi (lower half)

33
Q

what does the buccal branch of the facial nerve innervate?

A

orbicularis oris, zygomaticus, and the buccinator

34
Q

what does the cervical branch of the facial nerve innervate?

A

platysma

anat 316 (22 decks)

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