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Module 3 Revision > Anatomy: Floor Of The Mouth > Flashcards

Anatomy: Floor Of The Mouth Flashcards

1
Q

What structures make up the roof of the oral cavity?

A
  • hard palate
  • soft palate
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2
Q

What structure makes up the posterior border of the mouth?

A

The oropharyngeal isthmus

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3
Q

What is the oropharyngeal isthmus?

A

A space bounded laterally by the palatoglossal folds

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4
Q

What structures compose the floor of the oral cavity?

A

The tongue and muscles of FOM

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5
Q

What structures make up the anterior border of the oral cavity?

A

The alveolar/dental arches

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6
Q

What structure is very tightly adhered to the periosteum of the maxilla and palatine bones?

A

Palatal mucoperiostium

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7
Q

What mucosa is made up of non-keratinised stratified squamous epithelium?

A

Alveolar mucosa

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8
Q

The point where the alveolar mucosa meets the attached gingiva is known as?

A

The mucogingival junction

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9
Q

The bands of tissue anchoring mucosa to underlying bone are known as?

A

Labial frenula

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10
Q

What are sublingual folds?

A

Openings in the FOM for ducts if sublingual gland to drain through

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11
Q

What is the purpose of sublingual papillae?

A

Openings for submandibular gland ducts

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12
Q

What vein is a feature of the FOM?

A

The deep lingual vein

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13
Q

What muscle forms the most inferior part of the FOM?

A

The anterior belly of digastric

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14
Q

What innervates the anterior belly of digastric?

A

CN V3 via the nerve to mylohyoid

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15
Q

Where does the superficial part of the submandibular gland sit in relation to the mylohyoid muscle?

A

Sits inferiorly

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16
Q

Where does the deep part of the submandibular gland sit in relation to the mylohyoid muscle?

A

Sits superiorly

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17
Q

Where does the left and right geniohyoid muscles sit in relation to the mylohyoid muscle?

A

Superiorly (deeper)

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18
Q

Where do the sublingual glands sit in relation to the mylohyoid and geniohyoid?

A

They sit superior to the mylohyoid and lateral to the geniohyoid

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19
Q

What cranial nerve supplies the geniohyoid?

A

CN XII (hypoglossal nerve)

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20
Q

What two structures in the floor of the mouth cross over one another, and how?

A

The submandibular duct crosses over the top of the lingual nerve

21
Q

Where does the chorda tympani carry pre-synaptic parasympathetic fibres to synapse?

A

The submandibular ganglion

22
Q

Where are post-syntaptic parasympathetic fibres from the submandibular ganglion distributed?

A

To both the sublingual and submandibular glands

23
Q

Where does the chorda tympani relay special sensory fibres to?

A

Anterior 2/3rds of tongue

24
Q

What are the 4 main functions of the tongue?

A
  • forms food bolus to be swallowed
  • keeps mouth clean
  • speech
  • tasting and sensing food
25
Q

What nerve supplies general sensation to the anterior 2/3rds of the tongue?

A

The lingual nerve ( branch of CN V3)

26
Q

What nerve supplies special taste sensation to the anterior 2/3rds of the tongue?

A

CN VII (chorda tympani)

27
Q

Which nerve supplies general and special sensation to the posterior 1/3rd of the tongue?

A

CN IX ( Glossopharyngeal nerve)

28
Q

What structure divides the anterior and posterior parts of the tongue?

A

The terminal sulcus

29
Q

What nerve supplies vallate papillae?

A

CN IX

30
Q

What nerve supplies foliate papillae?

A

CN VII

31
Q

What nerve supplies filiform papillae?

A

CN V3

32
Q

What nerve supplies fungiform papillae?

A

CN VII

33
Q

Which papillae is an exception to the rule that CN IX only applies the anterior 2/3rds of the tongue?

A

Vallate papillae

34
Q

Which papillae is not a taste bud? It functions to mechanically move food.

A

Filiform papillae

35
Q

From the lateral side of the neck, explain the path of the hypoglossal nerve to reach the tongue.

A
  1. Passes between the internal carotid artery and internal jugular vein
  2. Passes inferior to anterior belly of digastric
  3. Passes into submandibular region, laterally to the hyoglossus muscle of the tongue
  4. Passes superiorly to mylohyoid in order to reach the tongue
36
Q

What are the two types of straited muscles of the tongue?

A

Intrinsic and extrinsic

37
Q

Which strained muscles act to alter the shape of the tongue?

A

Intrinsic muscles

38
Q

What do longitudinal intrinsic muscles do to the tongue?

A

Make it short and thick

39
Q

What do transverse and vertical intrinsic muscles do to the tongue?

A

Elongate and narrow it

40
Q

What are the four main extrinsic muscles?

A
  • palatoglossus
  • styloglossus
  • hyoglossus
  • genioglossus
41
Q

What extrinsic muscle can be considered the ‘main muscle of the tongue’?

A

Genioglossus

42
Q

Where does the genioglossus arise from to insert into the body of the tongue?

A

Arises from genial tubercules or mental spines

43
Q

What cranial nerve supplies all extrinsic muscles except the palatoglossus?

A

CN XII

44
Q

What cranial nerve supplies the palatoglossus?

A

CN X

45
Q

What happens to the tongue when the genioglossus muscle contracts?

A

The tongue sticks out

46
Q

What is the clinical test for CN XII?

A

Ask patient to stick tongue out straight.

  • if nerves are normal, tongue will remain in midline
  • if nerves are damaged, tongue will point towards the side of injured nerve
47
Q

The sublingual papillae serve as openings for saliva from which gland?

A

Submandibular gland

48
Q

The labial alveolar mucosa extends between the boundaries of which teeth?

A

3-3 ( canine to canine)

Module 3 Revision (20 decks)

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