Tongue and Floor of the Mouth Flashcards

1
Q

what is the roof of the oral cavity?

A

hard & soft palate

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2
Q

what is the floor of the oral cavity?

A

mainly soft tissues including TONGUE

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3
Q

what are the lateral walls of the oral cavity?

A

cheeks

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4
Q

what do the dental arches separate?

A

They separate the oral cavity into:
- oral vestibule
- oral cavity proper

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5
Q

what is the oral vestibule?

A

the slit like space between the teeth/gingivae and the lips/cheeks

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6
Q

what is the oral cavity proper?

A

space between the upper & lower dental arches

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7
Q

what is the philtrum?

A

the depression in the midline above the upper lip

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8
Q

what is the main muscular component of the lips?

A

the orbicularis oris

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9
Q

what anastomoses in the lips?

A

the superior & inferior labial arteries to form an arterial ring

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10
Q

what supplies blood to the cheeks?

A

buccal branches of the maxillary artery

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11
Q

what is the main muscular component of the cheeks?

A

buccinator muscle

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12
Q

what is the name of the mucosal fold that connects the gingivae to the lips?

A

labial frenulum

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13
Q

what muscle makes up the floor of the mouth?

A

mylohyoid muscle

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14
Q

what are the attachments of the mylohyoid muscle?

A

mylohyoid line of the mandible to the hyoid bone

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15
Q

what is the midline between the two mylohyoid muscles known as?

A

mylohyoid raphe

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16
Q

what are the attachments of the geniohyoid?

A
  • mental spine of mandible
  • body of hyoid
17
Q

what divides the anterior & posterior parts of the tongue?

A

terminal sulcus

18
Q

what are the different types of papilla to cover the tongue surface?

A
  • fungiform
  • foliate
  • circumvallate
  • filiforme
19
Q

where does the submandibular gland open into the oral cavity?

A

Sublingual papillae (caruncles)
- on the floor of the mouth at either side of the frenulum of tongue

20
Q

what are the intrinsic muscles of the tongue?

A
  • superior longitudinal
  • inferior longitudinal
  • vertical
  • transverse
21
Q

what are the intrinsic muscles responsible for?

A

changing the size & shape of the tongue

22
Q

what are the extrinsic tongue muscles responsible for?

A
  • protruding
  • retracting
  • elevating
  • depressing
23
Q

what are the extrinsic muscles of the tongue?

A
  • palatoglossus
  • genioglossus
  • hypoglosses
  • styloglossus
24
Q

what tongue muscle protrudes the tongue?

A

genioglossus

25
Q

what is the function of the hyoglossus?

A

depressing sides of the tongue

26
Q

what nerves enter the tongue on the external surface of the hyoglossus?

A
  • lingual nerve
  • hypoglossal nerve
27
Q

what is the function of the styloglossus?

A

elevating and retracting the tongue

28
Q

where does the palatoglossus muscle originate from?

A

palatine aponeurosis (fibrous tissue on posterior border of hard palate)

29
Q

what is the function of the palatoglossus muscle?

A

depresses soft palate towards the tongue & lifts posterior tongue

30
Q

what are the muscles of the tongue innervated by? what is the exception?

A

All innervated by HYPOGLOSSAL NERVE

APART FROM the palatoglossus
- vagus nerve

31
Q

what supplies general sensation to the anterior 2/3 of the tongue?

A

lingual nerve (from CNV3)

32
Q

what supplies general sensation to the posterior 1/3 of the tongue?

A

Glossopharyngeal nerve

33
Q

what supplies taste to the anterior 2/3 of the tongue?

A

facial nerve via chorda tympani

34
Q

what supplies taste to the posterior 1/3 of the tongue?

A

glossopharyngeal nerve

35
Q

what is the major arterial supply to the tongue?

A

lingual artery

36
Q

what veins drain the tongue? where do they drain to?

A

Deep lingual and dorsal lingual veins
- drain into the IJV