Chapter 87 Soft Tissues of the Oral Cavity

Question 1

Describe the sublingual and mandibular salivary duct

Answer 1

Mandibular duct courses under the mucosal sublingual folds and open at the sublingual caruncle. Sublingual duct courses alongside the mandibular and exits caudal to the mandibular duct at the sublingual caruncle

Question 2

Name the gustatory and non-gustatory papillae

Answer 2

Gustatory papillae of the tongue:
i. Fungiform
ii. Vallate
iii. Foliate
Non-gustatory papilla of the tongue:
i. Filiform
ii. Conical – grooming – especially cats

Question 3

Which nerves are involved in swallowing

Answer 3

CN V (trigeminal), VII (facial), IX (glossopharyngeal), X (vagus), XII (hypoglossal)

Question 4

What are the 3 phases and subphases of swallowing

Answer 4

Oropharyngeal (oral, pharyngeal, and pharyngoesophageal)
Esophageal
Gastroesophageal

Question 5

Describe the 3 subphases of the oropharyngeal phase of swallowing and which nerves are involved

Answer 5

Oral: formation of food bolus - voluntary
CN V, VII, XII

Pharyngeal: transport food through pharynx - involuntary
Swallowing center
CN IX and X

Pharyngoesophageal: passage of food from pharynx through cricopharyngeal sphincter into the esophagus - involuntary
CN IX and X

Question 6

Which nerve innervate the extrinsic and intrinsic tongue muscles

Answer 6

Hypoglossal (XII) nerve

Question 7

Which nerve innervates the rostral 2/3 of the lingual mucosa

Answer 7

Lingual nerve from the mandibular branch of the trigeminal (CN V) nerve

Question 8

Which nerve provides motor innervation to the rostral 2/3 of the tongue

Answer 8

Hypoglossal nerve XII

Question 9

Which nerve branch innervates the caudal 1/3 of the tongue

Answer 9

Lingual branch of Glossopharyngeal nerve (IX)

Question 10

Which nerve provides sensory innervation to the rostral 2/3 of the tongue?

Answer 10

Lingual nerve from the mandibular n., facial nerve