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Anatomy 2 Unit 2 > 9 - Nasal Cavity & Paranasal Sinuses > Flashcards

9 - Nasal Cavity & Paranasal Sinuses Flashcards

1
Q

Respiratory system

A

external environment exposure

portion superior to the hard palate

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2
Q

Nasal cavity divided into

A

the R & L nasal cavities with nasal septum separating them
opens anteriorly thru the nares
opens posteriorly into the nasopharynx

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3
Q

Nasal Cavity & Paranasal Sinuses - Roof is

A

curved and more narrow, except at the posterior portion

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4
Q

Nasal cavity and paranasal sinuses Floor is wider than

A

the roof

also divided into anterior & posterior portions

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5
Q

Nasal & Frontal bones =

A

anterior roof

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6
Q

Cribriform plate of ethmoid bone =

A

central part of roof

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7
Q

Body of sphenoid bone =

A

posterior roof

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8
Q

Palatine process of maxilla = =

A

anterior ¾ of floor

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9
Q

Horizontal plate of palatine bone =

A

posterior ¼ floor

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10
Q

Frontonasal roof =

A

anterior roof

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11
Q

Ethmoidal roof =

A

central roof

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12
Q

Sphenoidal roof =

A

posterior roof

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13
Q

4 paranasal air sinuses:

A

ethmoidal air cells
sphenoid,
maxillary and frontal paired sinuses

all are lined by respiratory mucosa – ciliated and mucous secreting.
all open into the nasal cavities
all are innervated by branches of the trigeminal nerve

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14
Q

Frontal Sinus - Found within

A

frontal bone lateral to midline

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15
Q

Frontal sinus Drains via

A

frontonasal duct / canal into infundibulum

Hiatus semilunaris

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16
Q

Frontal sinus - From here enters

A

middle meatus of nasal cavity

Anterior to ethmoidal bulla

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17
Q

Maxillary Sinus made up of

A

3 walls & appears pyramidal in coronal section
Superior wall –
Medial wall –
Lateral wall

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18
Q

Maxillary sinus Superior wall

A

separates sinus from orbit

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19
Q

Max sinus Medial wall – separates

A

sinus from nasal cavity

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20
Q

Max sinus Lateral wall – separates

A

sinus from infratemporal fossa

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21
Q

Nasal Cavity shares border with

A

Oral cavity, orbit, anterior cranial fossae

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22
Q

Nasal Cavity - shares neurovascular bundle

A

branches with oral cavity

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23
Q

Roots of upper teeth may project into

A

max sinus - May be covered by mucoperiosteum

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24
Q

Infection from a decaying tooth may spread into

A

sinus

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25
Q

Extraction of tooth may tear

A

membrane

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26
Q

Produces fistula between mouth & maxillary sinus

A

Patient then unable to blow cheeks out

air from mouth escapes via fistula into sinus & nasal cavity

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27
Q

Arterial Supply of Nasal Cavity

A

Anterior ethmoidal brs
Posterior ethmoidal brs
Sphenopalatine brs

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28
Q

Anterior ethmoidal brs supply

A

upper anterior septum & lateral wall

29
Q

Posterior ethmoidal brs. – supply

A

upper posterior septum & lateral wall

30
Q

Sphenopalatine brs. – supply

A

lower septum & lateral wall

31
Q

These form extensive anastomoses within

A

nasal cavity

Damage may cause nose to bleed profusely

32
Q

Nerves of Paranasal Sinuses

A

Brs. of maxillary (CN V2)
Greater petrosal brs. (CN VII)
Deep petrosal brs. (T1)

33
Q

Brs. of maxillary (CN V2) –

Nerves of paranasal sinuses

A

provide general sensation

34
Q

Greater petrosal brs. (CN VII) –

Nerves of paranasal sinuses

A

provide p-symp. fibers

35
Q

Deep petrosal brs. (T1) –

Nerves of paranasal sinuses

A

provide symp. fibers

36
Q

Nerves of paranasal sinuses - All travel to sinuses on

A

brs. Of CN V2

37
Q

Lateral septal cartilage underneath

A

nasalis muscle

38
Q

Alar cartilage around

A

nares

39
Q

Incisor crest

A

part of maxilla

40
Q

Conae

A

opening from nasal cavity to nasopharynx

41
Q

Antrum of nose

A

transition from stratified epithelium to ciliated pseudostratified columnar.

42
Q

Superior and middle conchae

A

ethmoid bone

43
Q

Inferior conchae

A

independent bone that articulates with maxilla.

44
Q

Nasal meatus

A

where air circulates, below conchae.

45
Q

Sphenoethmoidal recess

A

above superior conchae

46
Q

Infundibulum drains into

A

hiatus semilunaris - middle meatus

47
Q

Maxillary sinus osteum

A

soft tissue confined bony opening to max sinus. location varies

48
Q

Anterior nasal spine

A

attachment of fatty fibrous tissue and septal cartilage (anterior to incisal canal).

49
Q

Anterior ethomidals also drain to

A

hiatus semilunaris

50
Q

MIddle ethmoidals drain to

A

bulla

51
Q

Maxillary osteum at the end of

A

hiatus semilunaris

52
Q

If infection and need to drain max sinus, puncture

A

inferior meatus.

53
Q

Nasolacrimal duct drains into

A

inferior meatus

54
Q

Lateral labyrinth

A

ethmoid air cells

55
Q

Ethmoid air cells

A

continuous with mucosa, share ending with each other

56
Q

Anterior ethmoid cells drain to

A

semilunar hiatus

57
Q

middle ethmoid cells drain to

A

bulla

58
Q

posteiror ethmoid cells drain to

A

superior meatus

59
Q

Sphenoid sinus

A

between nasal cavity and pituitary

60
Q

Sphenoid sinus drains to

A

sphenoethomidal recess (most superior at roof of nasal cavity).

61
Q

puncta

A

opening - raised portion of lake.

62
Q

Sphenopalatine a gives of

A

posterior septal and postieor nasal branches

63
Q

lateral nasal

A

alar branch

64
Q

greater palatine artery supplies

A

septum after going through incisal foramen.

65
Q

kiselbach’s area

A

nosebleeds

66
Q

Nasopalatine n.

A

on nasal septum - anastamoses with greater palatine

67
Q

Nasociliary n.

A

origin for ethmoidal

68
Q

Sympathetic

A

vasculature

Anatomy 2 Unit 2 (15 decks)

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