Anatomy Flashcards

1
Q

Where is the root of the nose?

A

between the eyes

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2
Q

What is the length/rim of the nose called?

A

dorsum

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3
Q

What is the skin surrounding the nares called?

A

ala

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4
Q

What is the invaginated skin from the nose to the upper lip called?

A

philtrum

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5
Q

What is the bony projection out of the perpendicular plate of the ethmoid bone called

A

crista galli

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6
Q

What is the crista galli attached to?

A

falx cerebri- dura

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7
Q

What is found surrounding the perpendicular plate?

A

superior and middle concha which are themselves surrounded by ethmoidal air cells

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8
Q

How does the ethmoid bone contribute to the nasal cavity?

A

forms parts of the root, lateral walls and septum

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9
Q

How does the ethmoid contribute to the orbits?

A

forms an orbital plate which forms the medial aspect of the orbit

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10
Q

Where are the conchae found in the nasal cavity?

A

lateral wall (i.e not the septum

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11
Q

What forms the septum?

A

vomer; perpendicular plate of ethmoid; septal cartilage

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12
Q

What type of skull fracture can disrupt the cribiform plate and therefore smell?

A

Le Fort II and III

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13
Q

What type of mucosa is found in the nasal vestibule?

A

stratified squamous epithelium- changes from keratinised to non-keratinised

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14
Q

What are the 2 types of mucosa foudn in the nasal cavity?

A

respiratory epitheliu madn olfactory epithelium

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15
Q

What does the olfactory epithelium line?

A

the superior concha

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16
Q

What is the olfactory pathway?

A

receptor cells in the olfactory epithelium; pass up through cribiform plate; synapse with olfactory blub; neurons pass along olfactory tract to temporal lobe and olfactory areas

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17
Q

Where do the olfactory bulbs lie?

A

beside the crista galli

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18
Q

What is the somatic sensory innervation of the septum?

A

opthalmic and maxillary divisions of trigeminal

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19
Q

How do you divide up the areas of the septum supplied by the opthalmic and maxillary divisions?

A

draw a diagonal line from the sphenoidal sinus to the tip of the nose; above this line is ophthalmic and below is maxillary

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20
Q

What is the nerve of the ophthalmic division that supplies somatic sensory to the septum?

A

anterior ehtmoidal nerve

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21
Q

What is the nerve that is a branch of V2 that supplies the septum?

A

nasopalatine nerve

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22
Q

How does the nasopalatine nerve enter the septum?

A

through the sphenopalatine foramen

23
Q

How does the anterior ehtmoidla nerve enter the septum?

A

through the anterior ethmoidal foramen

24
Q

What are the 2 arteries that branch from the ECA that supply the face?

A

maxillary artery and facial artery

25
Q

What is the path of the maxillary artery?

A

ascends until just below the zygomatic arch then goes deep into the face

26
Q

What is the path of facial artery?

A

comes up just under the chin and splits into superior and inferior labial arteries which supply above and below the lips

27
Q

What artery derived form the ICA supplies the face?

A

ophthalmic artery

28
Q

What is the blood supply to the nasal septum?

A

anterior and posterio ethmoidal arteries; sphenopalatine and greater palatine arteries; lateral and nasal septal branches

29
Q

What are the anterior and posterior ethmoidal arteries branches of?

A

ophthalmic artery

30
Q

What are the sphenopalatine and greater palatine arteries branches of?

A

maxillary artery

31
Q

What are the lateral nasal and septal arteries branches of?

A

facial artery (superior labial artery)

32
Q

What is Kiesselbach’s (little’s) area?

A

site where anastamosis between all the arteries happens

33
Q

Where is Little’s area located?

A

anteroinferiorly on nasal septum

34
Q

What is foudn above the superior nasal concha?

A

sphenoethmoidal recess

35
Q

What is found between the sup. and middle nasal conchae?

A

superior meatus

36
Q

what is found between the middle and inferior nasal concha?

A

middle meatus

37
Q

What is found beneath the inferior nasal concha?

A

inferior meatus

38
Q

What is the sensory nerve supply of inferior nasal concha?

A

V2

39
Q

What are the conchae often referred to?

A

turbinates

40
Q

What can impact airflow through the nose?

A

engorgement of the nasal mucosa- changes side every 1-5 hours due to erectile tissue

41
Q

What is the purpose of creating turbulent airflow through the nasal cavity?

A

increased opportunity for humidifying, warming and filtering

42
Q

What are the paranasal sinsues?

A

open sapces within bone

43
Q

What are the 4 bilateral pairs of paranasal sinuses?

A

frontal; ethmoidal air cells; maxillary; sphenoid

44
Q

What type of epithelium lines the sinuses?

A

respiratory epithelium

45
Q

What lies immediately superior to the sphenoidal sinsu?

A

pituitary glnad

46
Q

Which of the paranasal sinuses is the largest?

A

maxillary

47
Q

What sinus drains into the phenoehtmoidal recess?

A

sphenoid sinus

48
Q

What drains into the superior meatus?

A

posteiror ethmoidal air cells

49
Q

What are the 2 parts of the middle meatus?

A

semilunar hiatus and the ehtmoidal bulla

50
Q

What drains into the semilunar hiatus?

A

frontal sinus; maxillary and anterior ethmoidal air cells

51
Q

what drains into the ethmoidal bulla?

A

middle ethmoidal air cells

52
Q

what drains into the inferior meatus?

A

nasalacrimal duct

53
Q

why is the maxillary sinus predisposed to infection?

A

the ostium of maxillary sinus is located superior in realtion to its cavity so cilia must work against gravity