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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
Extraction of tooth may tear
membrane
26
Produces fistula between mouth & maxillary sinus
Patient then unable to blow cheeks out | air from mouth escapes via fistula into sinus & nasal cavity
27
Arterial Supply of Nasal Cavity
Anterior ethmoidal brs Posterior ethmoidal brs Sphenopalatine brs
28
Anterior ethmoidal brs supply
upper anterior septum & lateral wall
29
Posterior ethmoidal brs. – supply
upper posterior septum & lateral wall
30
Sphenopalatine brs. – supply
lower septum & lateral wall
31
These form extensive anastomoses within
nasal cavity | Damage may cause nose to bleed profusely
32
Nerves of Paranasal Sinuses
Brs. of maxillary (CN V2) Greater petrosal brs. (CN VII) Deep petrosal brs. (T1)
33
Brs. of maxillary (CN V2) – Nerves of paranasal sinuses
provide general sensation
34
Greater petrosal brs. (CN VII) – Nerves of paranasal sinuses
provide p-symp. fibers
35
Deep petrosal brs. (T1) – Nerves of paranasal sinuses
provide symp. fibers
36
Nerves of paranasal sinuses - All travel to sinuses on
brs. Of CN V2
37
Lateral septal cartilage underneath
nasalis muscle
38
Alar cartilage around
nares
39
Incisor crest
part of maxilla
40
Conae
opening from nasal cavity to nasopharynx
41
Antrum of nose
transition from stratified epithelium to ciliated pseudostratified columnar.
42
Superior and middle conchae
ethmoid bone
43
Inferior conchae
independent bone that articulates with maxilla.
44
Nasal meatus
where air circulates, below conchae.
45
Sphenoethmoidal recess
above superior conchae
46
Infundibulum drains into
hiatus semilunaris - middle meatus
47
Maxillary sinus osteum
soft tissue confined bony opening to max sinus. location varies
48
Anterior nasal spine
attachment of fatty fibrous tissue and septal cartilage (anterior to incisal canal).
49
Anterior ethomidals also drain to
hiatus semilunaris
50
MIddle ethmoidals drain to
bulla
51
Maxillary osteum at the end of
hiatus semilunaris
52
If infection and need to drain max sinus, puncture
inferior meatus.
53
Nasolacrimal duct drains into
inferior meatus
54
Lateral labyrinth
ethmoid air cells
55
Ethmoid air cells
continuous with mucosa, share ending with each other
56
Anterior ethmoid cells drain to
semilunar hiatus
57
middle ethmoid cells drain to
bulla
58
posteiror ethmoid cells drain to
superior meatus
59
Sphenoid sinus
between nasal cavity and pituitary
60
Sphenoid sinus drains to
sphenoethomidal recess (most superior at roof of nasal cavity).
61
puncta
opening - raised portion of lake.
62
Sphenopalatine a gives of
posterior septal and postieor nasal branches
63
lateral nasal
alar branch
64
greater palatine artery supplies
septum after going through incisal foramen.
65
kiselbach's area
nosebleeds
66
Nasopalatine n.
on nasal septum - anastamoses with greater palatine
67
Nasociliary n.
origin for ethmoidal
68
Sympathetic
vasculature

Anatomy 2 Unit 2 (15 decks)

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