Oral Cavity, tongue and pharynx Flashcards

1
Q

Oral cavity - boundaries

A
  • roof = hard and soft palates
  • floor = mainly soft tissues, including tongue
  • lateral walls = cheeks
  • anterior = oral fissure
  • posterior = oropharynx
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2
Q

what is the oral vestibule?

A

space between the lips/cheeks and dental arches

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3
Q

Labial frenulum purpose

A

connects gingiva to the lips in the midline

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4
Q

Types of paipillae found on tongue

A
  • fungiform
  • foliate
  • vallate
  • filiform
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5
Q

which tongue papillae does not have tastebuds?

A

filliform

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6
Q

largest papillae, found anterior to terminal sulcus

A

Vallate

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7
Q

What separates the anterior 2/3rds to the posterior 3rd of the tongue?

A

the terminal sulcus

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8
Q

intrinsic muscles of the tongue - function

A

change shape and size of tongue

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9
Q

What are the intrinsic muscles of the tongue?

A

superior longitudinal
vertical
transverse
inferior longitudinal

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10
Q

The extrinsic muscles originate from outside of the tongue? what are their functions?

A

protruding, retracting, elevation and depression of the tongue

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11
Q

what are the extrinsic muscles of the tongue?

A

palatoglossus
styloglossus
hyoglossus
genioglossus

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12
Q

Genioglossus location

A
  • superior to geniohyoid muscles
  • originates from superior mental spine of mandible
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13
Q

Genioglossus function

A

protruding the tongue

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14
Q

Hyoglossus location

A
  • lateral to genioglossus
  • originates from grater horn of hyoid bone
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15
Q

Hyoglossus function

A

depressing the sides of the tongue

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16
Q

Where does the lingual artery enter the tongue?

A

between the hyoglossus and genioglossus

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17
Q

styloglossus origin

A

styloid process of temporal bone

18
Q

styloglossus function

A

elevating and retracting tongue

19
Q

Palatoglossus origin

A

the palatine aponeurosis

20
Q

tongue muscles motor innervation (not inc palatoglossus)

A

hypoglossal nerve

21
Q

palatoglossus motor innervation

A

vagus nerve

22
Q

general sensation anterior 2/3

A

mandibular nerve (CNV3)

23
Q

general sensation posterior 1/3 tongue

A

Glossopharyngeal (CNIX)

24
Q

special sensation anterior 2/3 tongue

A

facial nerve via Chorda tympani

25
posterior 1/3 tongue special sensation
glossopharyngeal nerve
26
blood supply of tongue
- lingual artery - deep lingual and dorsal veins drain into IJV
27
Hard palate is formed by
anterior 3/4 = palatine process of maxilla posterior 1/4 = horizontal process of palatine bones
28
Hard palate palate blood supply
greater palatine artery
29
soft palate blood supply
lesser palatine artery
30
Pharyngeal constrictors = function
pushing food bolus towards oesophagus
31
pharyngeal elevators - function
lifts pharynx to receive food bolus from oral cavity
32
What are the pharyngeal constrictors?
superior middle inferior
33
Pharyngeal constrictors = nerve supply
vagus nerve via pharyngeal plexus
34
Palatopharyngeus function
elevates pharynx and larynx draws softs palate downwards
35
palatopharyngeus nerve supply
vagus
36
stylopharyngeus function
elevates pharynx and larynx
37
stylopharyngeus nerve supply
glossopharyngeal nerve
38
salpingopharyngeus originates from...
the auditory tube (pharyngotympanic tube)
39
salpingopharyngeus function
elevates pharynx and larynx helps open the auditory tube during swallowing for pressure equalisation in the middle ear
40
Salpingopharyngeus nerve supply
vagus
41