Oral Cavity and Pharynx Flashcards

1
Q

How many deciduous (primary) teeth do we have?
How many permanent (secondary) teeth?

A

20 deciduous
32 permanent

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2
Q

What are the tissue layers of the teeth?

A
  • Enamel
  • Dentine
  • Pulp
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3
Q

What are the anatomical parts of the teeth?

A
  • Crown
  • Neck
  • Root
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4
Q

What are the parts of the tongue?

A
  • Root
  • Body
  • Apex
  • Dorsum of tongue
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5
Q

The root of the tongue is attached to…

A

mandible and hyoid

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6
Q

Name five structures of the dorsum of tongue

A
  1. Sulcus terminalis (terminal sulcus)
  2. Circumvallate (vallate) papillae
  3. Filiform papillae
  4. Fungiform papillae
  5. Lingual tonsil
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7
Q

What is the function of intrinsic tongue muscles?

A

Alter the shape of the tongue

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8
Q

What is the function of extrinsic tongue muscles?

A

Alter the position of the tongue

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9
Q

What is the sensory innervation of the tongue?

A

Lingual nerve (V3) and glossopharyngeal

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10
Q

What provides taste innervation to the tongue?

A

Chorda tympani (VII) and glossopharyngeal

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11
Q

What is the motor innervation of the tongue muscles?

A

Hypoglossal except one is vagus

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12
Q

What are the extrinsic muscles of the tongue?

A
  • Genioglossus
  • Hyoglossus
  • Styloglossus
  • Palatoglossus
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13
Q

Which tongue muscles depress the tongue?

A

Genioglossus and hyoglossus

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14
Q

Which tongue muscle works with genioglossus to form a central trough during swallowing?

A

Styloglossus

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15
Q

Which tongue muscle most commonly acts to constrict the space between oral cavity and oropharynx?

A

Palatoglossus

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16
Q

What are the intrinsic muscles of the tongue?

A
  • Superior longitudinal
  • Inferior longitudinal
  • Transverse
  • Vertical
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17
Q

Which muscles shorten/retrude the tongue?

A

Superior and inferior longitudinal

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18
Q

Which tongue muscle curls the tongue longitudinally upward, elevating the apex and sides of the tongue?

A

Superior longitudinal

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19
Q

Which tongue muscle curls the tongue longitudinally downward, depressing the apex?

A

Inferior longitudinal

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20
Q

Which tongue muscle narrows and elongates (protrudes) the tongue?

A

Transverse

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21
Q

Which tongue muscle flattens and broadens the tongue?

A

Vertical

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22
Q

What structures make up the hard palate?

A
  • Palatine process of maxilla
  • Horizontal plate of palatine bone
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23
Q

What are fauces?

A

Space between oral cavity and pharynx

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24
Q

The uvula and root of tongue are part of which palate?

A

Soft palate

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25
Q

What are the soft palate muscles?

A
  • Tensor veli palatini
  • Levator veli palatini
  • Palatoglossus
  • Palatopharyngeus
  • Musculus uvulae
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26
Q

What innervates tensor veli palatini?

A

Medial pterygoid nerve (branch of mandibular nerve CN V3) via otic ganglion

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27
Q

What innervates levator veli palatini?

A

Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus

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28
Q

What innervates palatoglossus?

A

Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus

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29
Q

What innervates palatopharyngeus?

A

Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus

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30
Q

What innervates musculus uvulae?

A

Pharyngeal branch of vagus nerve (CN X) via pharyngeal plexus

31
Q

Which muscle tenses the soft palate and opens mouth of pharyngotympanic tube during swallowing and yawning?

A

Tensor veli palatini

32
Q

Which muscle elevates soft palate during swallowing and yawning?

A

Levator veli palatini

33
Q

Which muscle elevates posterior part of tongue and draws soft palate onto tongue?

A

Palatoglossus

34
Q

Which muscle tenses soft palate and pulls walls of pharynx superiorly, anteriorly, and medially during swallowing?

A

Palatopharyngeus

35
Q

Which muscle shortens uvula and pulls it superiorly?

A

Musculus uvulae

36
Q

What are the salivary glands?

A
  • Parotid glands
  • Submandibular glands
  • Sublingual glands
37
Q

What are the functions of saliva?

A
  • Maintains moist environment for oral mucosa
  • Lubrication during chewing
  • Digestion break down of starches
  • Prevention of tooth decay/maintenance of biofilm
38
Q

Where are sublingual glands?

A

Floor of oral cavity between mandible and genioglossus

39
Q

Secretions from the sublingual gland flow through…

A

several ducts in sublingual folds

40
Q

What is the blood supply of sublingual glands?

A

Sublingual and submental arteries

41
Q

What is the innervation of sublingual glands?

A

Presynaptic parasympathetic secretomotor fibers from facial, chorda tympani, and lingual nerves that synapse in submandibular ganglion

42
Q

What are the three parts of the pharynx?

A
  • Nasopharynx
  • Oropharynx
  • Laryngopharynx
43
Q

Where is the pharynx?

A

Extends from cranial base to inferior border of cricoid cartilage/inferior border of C6
Connects with esophagus

44
Q

What are choanae?

A

Paired openings between nasal cavity and pharynx

45
Q

Pharyngeal tonsils are found in what part of the pharynx?

A

Nasopharynx

46
Q

Which part of the pharynx contains the pharyngotympanic tube/auditory tube?

A

Nasopharynx

47
Q

Which part of the pharynx contains torus tubarus (torus of pharyngotympanic tube)?

A

Nasopharynx

48
Q

What folds are found by the pharyngotympanic tube?

A

Salpingopharyngeal fold/salpingopharyngeus

49
Q

Which part of the pharynx has the pharyngeal recess?

A

Nasopharynx

50
Q

Which part of the pharynx contains the palatoglossal and palatopharyngeal arches/folds?

A

Oropharynx

51
Q

What nerve can be found in the tonsillar bed?

A

Glossopharyngeal nerve

52
Q

The tonsillar bed of the oropharynx contains which tonsils?

A

Palatine tonsils

53
Q

Describe voluntary deglutition

A

Bolus against palate pushed into oropharynx by muscles of tongue and soft palate

54
Q

Describe involuntary and rapid deglutition

A

Soft palate is elevated
Pharynx widens and shortens elevating the larynx (suprahyoid muscles and longitudinal pharyngeal muscles)

55
Q

Describe involuntary deglutition

A

Pharyngeal constrictors sequentially contract to force bolus inferiorly to esophagus

56
Q

Where is laryngopharynx in relation to the spine?

A

Area of C4-C6 bodies

57
Q

The laryngopharynx communicates with larynx through…

A

laryngeal inlet

58
Q

What is the piriform recess?
What does it contain?

A

Depression on either side of laryngeal inlet
Contains internal laryngeal nerve

59
Q

What are the circular external pharyngeal muscles?

A

Superior, middle, and inferior pharyngeal constrictors

60
Q

What are the longitudinal internal pharyngeal muscles?

A
  • Palatopharyngeus
  • Salpingopharyngeus
  • Stylopharyngeus
61
Q

What is the innervation of superior pharyngeal constrictor?

A

Pharyngeal branch of vagus (CN X) and pharyngeal plexus

62
Q

What is the innervation of middle and inferior pharyngeal constrictors?

A

Pharyngeal branch of vagus (CN X) and pharyngeal plexus, plus branches of external and recurrent laryngeal nerves of vagus

63
Q

What are the main actions of the circular external pharyngeal muscles?

A

Constrict walls of pharynx during swallowing

64
Q

What is the innervation of palatopharyngeus and salpingopharyngeus?

A

Pharyngeal branch of vagus (CN X) and pharyngeal plexus

65
Q

What is the innervation of stylopharyngeus?

A

Glossopharyngeal nerve (CN IX)

66
Q

What are the main actions of the longitudinal internal pharyngeal muscles?

A

Elevate (shorten and widen) pharynx and larynx during swallowing and speaking

67
Q

What is pharyngobasilar fascia?

A

Internal fascia of pharynx

68
Q

What is buccopharyngeal fascia?

A

External fascia of pharynx blends with pretracheal fascia

69
Q

What separates superior and middle pharyngeal constrictors?

A

Stylopharyngeus and glossopharyngeal nerve

70
Q

What separates middle and inferior pharyngeal constrictors?

A

Internal laryngeal nerve and superior laryngeal artery

71
Q

Stylopharyngeus and glossopharyngeal nerve separate…

A

superior and middle pharyngeal constrictors

72
Q

Internal laryngeal nerve and superior laryngeal artery separate…

A

middle and inferior pharyngeal constrictors

73
Q

Pterygomandibular raphe separates…

A

buccinator and superior pharyngeal constrictor

74
Q

What separates buccinator and superior pharyngeal constrictor?

A

Pterygomandibular raphe