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Head and Neck Anatomy > Oral Cavity > Flashcards

Oral Cavity Flashcards

1
Q

What makes up the lateral walls of the oral cavity?

A

Buccinator

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2
Q

What structure forms the diaphragm of the mouth?

A

Mylohyoid

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3
Q

Attachment sites for geniohyoid and genioglossus

A

Geniohyoid - inferior genial tubercle of mandible

Genioglossus - superior genial tubercle

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4
Q

list the supra hyoid muscles

A

Geniohyoid

Mylohyoid

Anterior and
Posterior belly of digastric

Stylohyoid

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5
Q

Which suprahyoid muscles are innervated by the facial nerve?

A

Posterior belly of digastric

Stylohyoid

Lie either side of stylomastoid foramen where facial nerve passes

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6
Q

Which supra hyoid muscles are innervated by CNV3?

A

Anterior belly of digastric

Mylohyoid

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7
Q

Innervation of geniohyoid?

A

C1 in hypoglossal

this is because geniohyoid sits close to hypoglossal nerve

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8
Q

Innervation of sublingual salivary gland

A

Facial CN VII

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9
Q

Innervation of parotid gland?

A

Glossopharyngeal (IX)

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10
Q

Innervation of submandibular saliva glands?

A

Facial CN VII

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11
Q

Sensory supply to anterior 2/3rd of tongue?

A

Lingual nerve
- branch of CNV3

Taste fibres also carried by lingual but originate from facial and travel on chorda tympani

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12
Q

Motor supply to tongue?

A

Hypoglossal nerve

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13
Q

What is responsible for bumpy appearance on posterior 3rd of tongue

A

lingual tonsil

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14
Q

what lymphoid tissue protects the nasopharynx?

A

Adenoid tonsils

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15
Q

Action and innervation of intrinsic muscles of the tongue?

A

mould food bolus

Hypoglossal CN XII

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16
Q

Name and give the action of the extrinsic muscles of the tongue?

A

Genioglossus
- Depresses tongue

Palatoglossus
- Elevates tongue

Styloglossus
- Elevates and retracts tongue

Hyoglossus
- Depresses tongue

17
Q

What is the innervation of the extrinsic muscles of the tongue?

A

Hypoglossal except palatoglossus which is CN X

18
Q

Blood supply and venous drainage of tongue

A

Lingual artery
- 2nd ant branch of external carotid

Lingual vein
- communicates with internal jugular vein

19
Q

Describe the lymphatic drainage of the tongue?

A

Tip = Submental nodes

Lateral edge = submandibular nodes

Central and posterior = deep cervical nodes

20
Q

What is the mucosa of the hard palate innervated by?

A

Facial nerve CN VII

21
Q

Blood supply to hard palate?

A

greater palatine artery

- branch of 3rd part of maxillary

22
Q

Innervation of hard palate?

A

Branches of CN V2

CN V2 only sensory

Greater palatine

23
Q

Innervation of soft palate

A

Lesser palatine
- Branch of greater palatine (CNV2) that passes posteriorly to supply soft palate

Also CN IX

24
Q

Name the muscles that move the soft palate.

A

Tensor veli palatini

Levator veli palatini

Palatoglossus

Palatopharyngeus

Musculus uvulae

25
Q

Innervation of muscles that move soft palate?

A

All CN X except tensor veli palatini

26
Q

Innervation of tensor veli palatini

A

CN V3

27
Q

Which muscle wraps its tendon around pterygoid hamulus?

A

Tensor veli palatini

28
Q

Action of the soft palate muscles?

A

Tensor veli palatini - tenses soft palate

Levator veli palatini - elevates soft palate

palatoglossus - elevates tongue and helps close oral cavity from oropharynx

Palatopharyngeus - elevates pharynx and moves pharyngeal wall forwards towards the soft palate

Musculus uvulae - elevates and retracts uvula

29
Q

Lymphatic drainage of soft palate?

A

Deep cervical nodes

30
Q

How does the facial nerve supply small glands of the palate?

A

Facial nerve sends fibres to pterygopalatine ganglion via the greater petrosal nerve which then joins CN V2

31
Q

Describe an edentulous mandible.

A

When teeth are los the alveolar bone that supported the teeth is absorbed –> reduced bone in that area.

if all teeth are lost then the forces that normally pass from the teeth during mastication is lost so all supporting alveolar bone is lost

32
Q

Nerve supply to teeth and gums?

A

Branches of CN V2 supply upper, CN V3 (mental branch) supplies lower teeth and gums

33
Q

blood supply to teeth and gums?

A

alveolar branches of maxillary artery

Head and Neck Anatomy (14 decks)

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