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LECOM MS1 Gross Anatomy - Head/Neck 2022 (+Shelf) > Oral & Nasal Cavity > Flashcards

Oral & Nasal Cavity Flashcards

(61 cards)

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1
Q

What is the roof of the nasal cavity?

A

Frontal, nasal, ethmoid, and sphenoid bone

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2
Q

What is the floor of the nasal cavity?

A

Palatine process of maxilla, horizontal plate of palatine bones

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3
Q

What is the lateral wall of the nasal cavity?

A

Nasal conchae, frontal process of maxilla, perpendicular plate of palatine bone, medial pterygoid plate

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4
Q

What is the medial wall of the nasal cavity?

A

Nasal septum

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5
Q

What are the connections of the nasal cavity?

A

Nasopharynx, anterior cranial fossa, paranasal sinuses, pterygopalatine fossa, infratemporal fossa, orbit, oral cavity, outside world!

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6
Q

Where does the sphenopalatine foramen connect?

A

Pterygopalatine fossa

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7
Q

What runs through the sphenopalatine foramen?

A

Sphenopalatine artery

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8
Q

What can found in the lateral wall of the nasal cavity?

A

Superior concha, middle concha, and inferior concha

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9
Q

What composes of the septum?

A

Septal cartilage, vomer, perpendicular plate of the ethmoid bone

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10
Q

What provides passage from nasal cavity to nasopharynx?

A

Choanae

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11
Q

What sinus is found inside the ethmoid bone?

A

Ethmoid sinus -> ethmoid air cells

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12
Q

What is the conchae?

A

Bony projection covered in mucosa

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13
Q

What does the conchae do?

A

Create passages (meati) to direct airflow
Create turbulence and increase mucosal surface area to warm and humidify air

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14
Q

What are the sinuses?

A

Air-filled spaces in bones surrounding nasal cavity lined by mucous membranes

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15
Q

Where do the sinuses drain into?

A

Nasal cavity via meati

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16
Q

What are the four sinuses?

A

Frontal, ethmoidal, sphenoidal, and maxillary

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17
Q

Route of movement of chonae?

A

Chonae -> larynx -> trachea

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18
Q

What is the largest sinus?

A

Maxillary sinus

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19
Q

What is the asymmetrical sinus?

A

Frontal sinus

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20
Q

What sits under the sella turcica?

A

Sphenoid sinus

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21
Q

Where is the ethmoid sinus?

A

Medial border

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22
Q

How can we use the sphenoid sinus?

A

Access and remove the pituitary gland

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23
Q

Where is the sphenoid sinus drainage site?

A

Spheno-ethmoidal recess

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24
Q

Where is the frontal sinus drainage site?

A

Semilunar hiatus of middle meatus (via frontonasal duct)

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25
Where is the ethmoid sinus drainage site?
Posterior air cells -> superior meatus Anterior and inferior air cells -> middle meatus
26
Where is the maxillary sinus drainage site?
Semilunar hiatus of middle meatus
27
How can infections break through the ethmoid sinus?
Medial wall of orbit Posterior ethmoidal sinus infections
28
What does posterior ethmoidal sinus infection impact?
Optic nerve (CN II)
29
What is difficult to drain?
Maxillary sinus (tilting head) Intimately related to maxillary molars and superior alveolar nerves
30
What is sphenoid sinus medial to?
Cavernous sinus
31
Where does nasolacrimal duct drain?
Inferior meatus
32
What forms the Kiesselbach's Plexus?
Anterior and posterior ethmoidal artery (septal branch), sphenopalatine artery, greater palatine artery, superior labial artery
33
Where does the submucosal venous plexus drain?
Sphenopalatine vein, facial vein, superior ophthalmic vein, pterygoid plexus (to ITF)
34
What is the GSA innervation of the nasal cavity?
CN V1/V2
35
What is the GVE parasympathetic innervation of nasal cavity?
Greater petrosal nerve via CN VII Synapses at PPG
36
What is the GVE sympathetic innervation of nasal cavity?
T1-T4 via external carotid nerves
37
Where does lymph from anterior nasal cavity drain?
Submandibular nodes
38
Where does lymph from the posterior nasal cavity drain?
Superior deep cervical nodes
39
What is the roof of the oral cavity?
Hard & soft palate
40
What is the floor of the oral cavity?
Soft tissue (tongue, musculature)
41
What is the lateral border of oral cavity?
Cheek, buccinator
42
What are the regions of oral cavity?
Oral vestibule, oral cavity proper
43
What are the bones of the oral cavity?
Maxilla, palatine, mandible, hyoid, temporal, sphenoid
44
What are the oral cavity connections?
Nasal cavity, oropharynx, outside world
45
What makes up the "hammock" of the oral cavity?
Mylohyoid & geniohyoid muscles
46
What does the mylohyoid & geniohyoid do?
Depress mandible
47
What are the extrinsic muscles of the tongue?
Genioglossus, hyoglossus, styloglossus, palatoglossus
48
What are the extrinsic muscles of the tongue (except one) innervated by?
CN XII
49
What extrinsic tongue muscle is the exception? How so?
Palatoglossus -> CN X
50
What is the sensory innervation of the anterior 2/3 portion of the tongue?
GSA: lingual nerve (CN V3) SVA: chorda tympani (CN VII)
51
What is the sensory innervation of the posterior 1/3 portion of the tongue?
GVA: glossopharyngeal nerve (CN IX) SVA: glossopharyngeal nerve (CN IX)
52
What occurs when lingual nerve is injured to tongue?
Loss of general sensation to anterior 2/3 of tongue
53
What occurs when chorda tympani is injured to tongue?
Loss of taste sensation on anterior 2/3 of tongue + dry mouth
54
When occurs when complete lingual nerve + chorda tympani are injured to tongue?
Loss of general sensation to anterior 2/3 of tongue Loss of taste sensation on anterior 2/3 of tongue + dry mouth Dry mouth
55
What is the blood supply of the tongue, sublingual gland, gingivae, and oral mucosa?
Lingual artery
56
What is the venous drainage of the tongue?
Dorsal lingual veins and deep lingual veins to internal jugular vein
57
What is the lymph drainage of tongue?
Bilateral lymph drainage!
58
What is the innervation of the salivary glands (submandibular and sublingual glands)
GVE para: CN VII (chorda tympani) GVE sym: T1-T4 GSA CT capsule: CN V3
59
What is the blood supply/venous drainage of tongue?
Facial a/v (submandibular) Lingual a/v
60
What is the lymph drainage of salivary glands?
Submandibular nodes
61
Lingual nerve goes... the submandibular duct, which can cause...
Underneath, loss of anterior 2/3 of tongue taste & sensation

LECOM MS1 Gross Anatomy - Head/Neck 2022 (+Shelf) (29 decks)

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