H&N 4: Oral & Nasal Cavities #2 Flashcards

1
Q

What is function of mandibular nerve?

A
  • provides sensory supply to lower part of mouth, floor + ant. part of tongue + teeth
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2
Q

What is function of lingual nerve?

A
  • provides general sensation to ant. 2/3 of tongue

- also supplies floor of mouth

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3
Q

What is the origin + function of chorda tympani?

A
  • from facial nerve

- brings taste fibres to ant. 2/3 of tongue

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4
Q

What is function of inf. alveolar nerve?

A

supply lower teeth

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5
Q

What is mental branch?

A

supply skin of chin

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6
Q

What is the nerve to mylohyoid?

A

motor branch

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7
Q

What is the function of the maxillary nerve branches?

A

supplies mucous mem of roof of oral cavity

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8
Q

What is function of branches of mandibular div (lingual nerve)?

A
  • supplies lat. walls + floor of mucous mem of oral cavity

- supplies ant. belly of digastric + mylohyoid?

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9
Q

What is function of facial nerve?

A

supplies muscle in lat. walls of oral cavity

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10
Q

What nerve supplies geniohyoid?

A

C1 fibres

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11
Q

What are teeth supplied by?

A
  • alveolar branches of maxillary (upper)

- mandibular nerve (lower)

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12
Q

Where does the tongue lie?

A
  • ant. 2/3 in oral cavity

- post. 1/3 in oropharynx

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13
Q

What is the tongue + its function?

A
  • mobile, muscular organ (intrinsic + extrinsic) covered by mucous mem
  • involved with mastication, taste, deglutiton (swallowing), articulation + oral cleansing
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14
Q

Where are taste fibres located?

A
  • fungiform (keratinised) + vallate papillae
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15
Q

What is the function of the vallate papillae?

A

joins ant. + post. part of tongue

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16
Q

What is function of glossopharygeal?

A

post 1/3 taste + sensation

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17
Q

What is root of tongue supplied by?

A

vagus - for taste + sensation

18
Q

What is the function of intrinsic + extrinsic muscles?

A
  • intrinsic: change shape of tongue

- extrinsic: change its pos

19
Q

List the extrinsic muscles + where they attach from?

A
  1. Palatoglossus - from soft palate
  2. Styloglossus - from styloid process
  3. Hyoglossus - from hyoid
  4. Genioglossus - from mandible genu (bend)
20
Q

What is function of hypoglossal?

A

supplies styloglossus, genioglossus + hyoglossus

21
Q

How does nerve supply for general sensation vary across the tongue?

A
  • ant: lingual (mandibular div of V)
  • post 1/3: glossopharyngeal
  • root: vagus
22
Q

How does nerve supply for taste vary across the tongue?

A
  • ant: chorda tympani
  • post 1/3: glossopharyngeal
  • root: vagus
23
Q

What is function of salivary glands?

A
  • small ones keep mouth moist

- large ones secrete in response to food entering mouth

24
Q

List 3 pairs of large salivary glands + its secretion

A
  1. parotid (serous)
  2. sublingual (mucus)
  3. submandibular (mixed)
25
Q

Where does the parotid duct enter?

A
  • enters mouth near upper 2nd molar tooth

- pierces buccinator

26
Q

Where does the submandibular duct enter?

A

floor of mouth

27
Q

Where does the sublingual gland enter?

A
  • 16-20 short ducts which open into floor of mouth
28
Q

What are the functions of the major glands?

A
  • moisten food, dissolving chem which stim taste bud

- moisture in saliva helps turn food into bolus to aid swallowing + contains enz which begins process of digestion

29
Q

What are the functions of the minor glands?

A
  • maintaining oral hygiene

- flushes oral surfaces + helps to control level of bacteria

30
Q

What is function of ext. carotid?

A

provides blood supply to mouth

31
Q

What is function of lingual artery?

A

supplies tongue on both sides

32
Q

Describe the 1st route of the veins of the tongue

A
  • post. lingual veins drain dorsum + sides of tongue + join lingual vein which accompanies artery
  • near greater cornu of hyoid, lingual vein joins int. jugular
33
Q

Describe the 2nd route of the veins of the tongue

A
  • deep lingual vein begins near tip of tongue + turns backwards on its ant. surface
  • near border of hyglossus, it joins sublingual vein which runs along course of hypoglossal + joins facial vein
34
Q

What is the tongue ant. + post. to vallate papillae drained into + route afterwards?

A
  • ant 2/3: central + marginal lymph vessels
  • post 1/3: drain into post. lymph vessels
  • then enter series of nodes where efferent vessels drain into nodes surrounding SCM
35
Q

What is sig about submental nodes in ant. tongue + nodes in post. tongue?

A
  • easier to pick up cancers in ant. part

- harder to see + pick up cancers in post, part

36
Q

List functions of nose + nasal cavity?

A
  1. provides airway for resp
  2. moistens + warms inspired air
  3. filters air to remove foreign particles
  4. houses olfactory receptors
  5. acts as resonating chamber for speech
37
Q

What does the ext. part of nose consist of?

A

cartilages covered by skin

38
Q

What does the int. part of nose consist of?

A
  • skin

- hairs which filter air

39
Q

What is the nasal cavity mucosa + its function?

A
  • PS ciliated columnar with goblet cells
  • lamina propria contain glands with serous + mucus acini
  • produce mucus which forms sticky sheet covering surface of nasal cavity
  • dust, bacteria, pollen + viruses stick to it + cilia waft material to nasopharynx where its swallowed + destroyed in acidic env of stomach
40
Q

What is the function of the conchae?

A
  • create turbulence in air which gets dust particles on walls for cilia to move them away
  • moisten air from mucus gland secretions
  • vascular mucous mem with capillary plexuses in lamina propria lots of blood for keeping air warm