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Gross Anatomy 2 > Exam 3: Paranasal Sinuses and Guttural Pouches > Flashcards

Exam 3: Paranasal Sinuses and Guttural Pouches Flashcards

1
Q

Air-Filled, mucous membrane lined diverticula of nasal cavity

A

sinuses

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2
Q

Which bones of the skull contain sinuses?

A

nasal, frontal, maxillary

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3
Q

What are 4 functions of sinuses?

A
  1. thermal protection
  2. mechanical protection
  3. dec. wt. of skull
  4. resonance of voice
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4
Q

Clinical significance of sinuses?

A
  1. Trauma
  2. Association with dentition
  3. neoplasia
  4. infection
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5
Q

What are the 5 sinuses in animals?

A
  1. palatine
  2. sphenoid
    3 frontal
  3. maxillary
  4. lacrimal
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6
Q

Which sinus is absent in pigs and carnivors?

A

palatine

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7
Q

Which sinus is absent in dogs and small ruminants?

A

sphenoid

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8
Q

Which sinus is present in pigs and ruminants, and is an extension of the maxillary sinus

A

lacrimal

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9
Q

The paranasal sinus of the horse is made up of which 2 sinuses?

A
  1. frontal

2. maxillary

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10
Q

The frontal sinus plus the dorsal concha are together called:

A

conchofrontal sinus

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11
Q

The maxillary sinus invades which concha?

A

ventral

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12
Q

Maxillary sinus is divided into two parts:

A
  1. rostral

2. caudal

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13
Q

Surgical boundaries of eq. frontal sinus:

A
  1. Caudal: line through zygomatic process of frontal bone
  2. Rostral: Half way between orbit and infraorbital foramen
  3. median: 2cm from midline
  4. lateral: oblique line, from supraorbital foramen to rostral most portionof median limit
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14
Q

Surgical boundaries of eq. maxillary sinus:

A
  1. caudal: rostral portion of orbit
  2. infraorbital foramen
  3. Dorsal: line from infraorbital foramen to facial crest
  4. ventral: facial crest
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15
Q

T/F. frontal and dorsal conchal sinus communicate with eachother?

A

T

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16
Q

What are the frontal and dorsal conchal sinus referred to as?

A

conchofrontal sinus

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17
Q

Which sinus is found within the frontal and nasal bones?

A

conchofrontal sinus

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18
Q

Is the conchofrontal sinus superficial or deep to nasal cavities?

A

superficial

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19
Q

T/F. Conchofrontal sinus directly communicates with nasal cavity?

A

F. must pass through maxillary sinus first, then nasal cavity

20
Q

Slit-like communication of maxillary sinus with nasal cavity.

A

Nasomaxillary opening

21
Q

Where does the nasomaxillary opening open?

A

middle nasal meatus

22
Q

How does the conchofrontal sinus communicate with the maxillary sinus?

A

frontomaxillary opening

23
Q

The maxillary sinus contains the roots of which teeth?

A

PM4, M1-3

24
Q

In bovine, the frontal sinus opens to the nasal passage via ______

A

ethmodial meatus

25
Q

What are the 3 blind pouches of the bovine frontal sinus?

A
  1. postorbital diverticulum
  2. cornual diverticulum
  3. nuchal diverticulum
26
Q

which blind pouch of the bovine frontal sinus is caudal and medial to the orbit?

A

postorbital diverticulum

27
Q

Which blind pouch of the bovine frontal sinus occupies the base of the horn?

A

cornual diverticulum

28
Q

Which blind pouch of the bovine frontal sinus is the most caudal end of the sinus?

A

nuchal diverticulum

29
Q

Which blind ended pouch of the bovine frontal sinus is the largest?

A

postorbital diverticulum

30
Q

Why must you dehorn cows at a young age?

A

to avoid damage to the cornual diverticulum

31
Q

Surgical boundries of the frontal sinus in bovine:

A
  1. caudal: bse of skull

2. rostral: border of orbit

32
Q

How does the bovine maxillary sinus communicate with the nasal cavity?

A

nasomaxillary opening

33
Q

T/F the maxillary and frontal sinus communicate in the bovine

A

F

34
Q

Surgical boundreis of maxillary sinus in cow:

A
  1. caudal: rostral border of orbit
  2. rostral: facial tuberosity
  3. dorsal: line from medial orbit to infraorbital foramen
  4. ventral: line from zygomatic arch to facial tuberocity
35
Q

Extension of maxillary sinus in cow:

A

lacrimal bulla

36
Q

connects each middle ear to the nasopharynx and allows air to pass b/t the tympanic cavity and ouside of body

A

auditory tube

37
Q

dilation of auditory tubes in horse?

A

guttural pouches

38
Q

How many guttural pouches do equine have?

A

2 Right and left separated by thin septum

39
Q

what bone incompletely divides each guttural pouch into medial and lateral compartments?

A

stylohyoid

40
Q

T/F. the medial and lateral compartments of the guttural pouch do not communicate.

A

F. communicate freely

41
Q

What nn. are located close to the medial guttural pouch?

A

CN 9-12

42
Q

What a. is located close to the medial guttural pouch?

A

internal carotid a.

43
Q

What n is located close to the the lateral guttural pouch?

A

Facial n.

44
Q

What a. is located close to the lat. guttural pouch?

A

external carotid

45
Q

What is guttural tympany?

A

when guttural pouch fills with air

inability of air to escape through pharyngeal opening of auditory tube

46
Q

What lymph nodes are located just ventral to the guttural pouch?

A

retropharyngeal

Gross Anatomy 2 (27 decks)

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