Oral cavity, Salivary Glands, Oesophagus and stomach

Question 1

what are the two components of the mouth?

Answer 1

oral vestibule

• narrow space between teeth and gingival and lips and cheeks

Oral cavity proper

• enclosed by dental arches

Question 2

What are the bounderies of oral cavity proper?

Answer 2

Ant- lips

Post- oropharyngeal isthmus to oropharynx

Roof- Hard palate anteriorly and soft palate posteriorly

Floor- muscular diaphragm- mylohyoid, geniohyoid, tongue, salivary glands and ducts

Question 3

What is the innervation of the following:

1. upper parts of cavity including palate and upper teeth
2. lower parts of cavity including oral tongue and mouth
3. taste from anterior 2/3 tongue
4. parasympathetic fibres of oral cavity glands
5. sympathetic fibres of oral cavity
6. Floor of oral cavity- mylohyoid

Answer 3

1. branches of maxillary nerve CNV2
2. branches of mandibular nerve CNV3
3. branches of facial nerve CNVII
4. branches of the facial nerve
5. T1, synapse in superior cervical ganglion and distributed to oral cavity along the trigeminal nerve and blood vessels
6. branches of mandibular nerve

Question 4

What are the muscles of the tongue innervated by

Answer 4

All muscles, except palatoglossus are innervated by hypoglossal nerve CNVII

Question 5

What is the innervation for the muscles of the soft palate?

Answer 5

Vagus nerve CNX, except tensor veli palatini

Tensor veli palatini- branch form mandibular nerve CNV3