UNIT 14 - Oral cavity

What is the oral vestibule ?

space between the teeth and the cheeks or lips

What are the functions of oral cavity ?

• food intake/mastication

• housing of the teeth

• speech/taste perception

What bones are forming the hard palate ?

• palatine bone

• maxilla

Which foramens are in the hard palate ?

• incisive foramen (nasopalatine nerve)

• greater foramen

• lesser foramen

What is the main function of soft palate ?

Close the nasopharynx

What are walls of the mouth composed of ?

cheeks including buccinator muscles

What are the important artery branches of oral cavity ?

• Maxillary aretery

• Facial artery

• Lingual artery

What is the sensory innervation of oral cavity ?

• maxillary nerve (V2)

• mandibular nerve (V3)

What is the motor innervation of oral cavity (give the different nerves associated to it) ?

• trigeminal nerve (V)

• facial nerve (VII)

• hypoglossal (XII)

What is the particularity of POST root of the tongue ?

It is fixed, attached to hyoid and mandible bones

What is connecting the tongue to the floor of the mouth ?

lingual frenulum

Where are located sublingual folds ?

on each side of the frenulum

What are the sublingual folds ?

contain the opening of the excretory ducts of the sublingual glands

What is the inferior surface of the oral cavity made of ?

• lingual frenulum

• sublingual folds

• sublingual caruncles

What are the important branches of external carotid artery ?

• Facial

• Maxillary

• Lingual

Which papillae doesn’t contain taste buds ?

Filiform papillae

What is the only muscle of the tongue that hypoglossal nerve isn’t innervating ?

Palatoglossus (innervated by X nerves)

What are intrinsic muscles of the tongue doing ?

• modifying the shape of the tongue

• precise tongue movements for speech, eating, swallowing

What are the extrinsic muscles of the tongue ?

• Genioglossus

• Hyoglossus

• Styloglossus

• Palatoglossus

What type of saliva does parotid gland secrete ?

watery saliva and salivary amylase

Which nerve innervates the parotid gland ?

Glossopharyngeal nerve (IX)

What type of saliva does submandibular gland secrete ?

Mixed (but mainly serous)

Which nerve innervates the submandibular gland ?

Facial nerve (VII)

Which type of saliva does sublingual gland secrete ?

Mixed (but more mucous)

Which nerve innervates the sublingual gland ?

Facial nerve (VII)

What is the name of the ducts of submandibular glands ?

Wharton’s duct which open the sublingual caruncles

What is the name of the ducts of parotid glands ?

Stenon’s duct which open in oral vestibule

What is the name of the ducts of sublingual glands ?

Rivinus ducts which open along the sublingual folds