Oral Cavity Anatomy Flashcards

Flashcards about the oral cavity.

What is the roof of the oral cavity?

Hard palate

What forms the floor of the oral cavity?

Tongue and muscles

What are the anterior boundaries of the oral cavity?

Lips

What are the lateral boundaries of the oral cavity?

Cheeks

What does the oral cavity communicate with posteriorly?

Oropharynx

Name contents of the oral cavity.

Gums, teeth, tongue, openings of salivary glands, blood vessels, nerves

Into what two parts is the mouth divided?

Vestibule of mouth and oral cavity proper

What structures bound the vestibule of the mouth?

Teeth & gums, lips, cheeks

What duct opens into the vestibule of the mouth?

Parotid duct

Where does the parotid duct open?

Level of second upper molar teeth

What becomes the anterior and lateral boundaries of the oral cavity proper?

Teeth and gums

Which glands open into the oral cavity proper?

Submandibular and sublingual glands

What structure is present in the oral cavity proper?

Tongue

What nerve lesion impairs buccinator muscle function?

Lesion to the buccal branch of the Facial N (CN VII)

What are the superior boundaries of the oral cavity proper?

Hard and soft palates

What forms the inferior boundary (floor) of the oral cavity proper?

Tongue and mucous membrane

What is the posterior boundary of the oral cavity proper?

Oropharyngeal isthmus (isthmus of fauces)

Which cranial nerves provide sensation to the oral cavity?

V2 and V3

Which nerve provides sensory innervation to the superior lip?

Infraorbital N. (from V2)

Which nerve provides sensory innervation to the hard palate?

Greater Palatine N. (from V2)

Which nerve provides sensory innervation to the soft palate?

Lesser Palatine N. (from V2)

Which nerves provide sensory innervation to the upper teeth and gingiva?

Superior Alveolar Nerves (from V2)

Which nerve provides sensory innervation to the cheek?

Buccal N. (from V3)

Which nerve provides sensory innervation to the lower teeth and gingiva?

Inferior Alveolar N (IAN) (from V3)

Which nerve provides sensory innervation to the lower lip?

Mental N. (from V3)

Which nerve provides sensation to the anterior tongue and carries PS + taste fibers?

Lingual N. (LN) (from V3)

Which nerve takes PS fibers from CN IX to the parotid gland?

Auriculotemporal N.

Which nerve innervates the muscles of mastication?

V3

What two parts make up the palate?

Hard palate and soft palate

Which part of the palate is the anterior bony part?

Hard palate

Which part of the palate is the posterior muscular part?

Soft palate

What projection is located on the soft palate?

Uvula

What processes and plates form the hard palate?

Palatine processes of maxillae (ant.2/3) and horizontal plates of palatine bones (post.1/3)

With what is the hard palate continuous posteriorly?

Soft palate

What covers the upper surface of the hard palate?

Nasal mucosa

What is contained in the lower surface of the hard palate?

Palatine glands, oral mucosa + taste buds

What artery supplies blood to the hard palate?

Greater palatine artery from maxillary A

Which nerves supply the hard palate?

Greater and lesser palatine nerves from pterigopalatine ganglion

What nerves/vessels pass through the incisive foramen?

Nasopalatine nerves, greater palatine vessels

What nerves/vessels pass through the greater palatine foramen?

Greater palatine nerves/vessels

What nerves/vessels pass through the lesser palatine foramina?

Lesser palatine nerves/vessels

Describe the location of the soft palate.

Forms posterior 1/3, mobile fold attached to posterior border of hard palate

What two folds arise from the soft palate?

Platoglossal & palatopharyngeal folds

What is the uvula?

Conical projection in the midline of the soft palate

With what is the soft palate continuous at the sides?

Lateral wall of oropharynx

Name the muscles of the soft palate.

Levator veli palatini, Tensor veli palatini, Musculus uvulae, Palatopharyngeus, Palatoglossus

What is the function of the levator veli palatini?

Elevates the palate

What is the function of the tensor veli palatini?

Tightens and elevates

What is the function of the musculus uvulae?

Retracts uvula

What is the function of the palatopharyngeus?

Depresses soft palate & pulls pharynx up during swallowing

What is the function of the palatoglossus?

Depresses soft palate, elevates tongue, approximates palatoglossal arches

What is the function of the soft palate?

Controls air and food passages, alters voice, directs air during sneezing, contains taste buds

What is the sensory supply of the anterior part of the hard palate?

Greater palatine (from V2) and Nasopalatine nerve (from V2)

What is the sensory supply of the posterior part of the soft palate, pillars & fauces:

BY GLOSSOPHARYNGEAL NERVE (IX)

What nerve provides motor supply to all muscles of the soft palate EXCEPT TENSOR PALATI?

Pharyngeal plexus (Vagus (X) + Cranial Accessory nerve (XI))

What nerve supplies the tensor palati muscle?

Mandibular nerve.

List possible effects of cleft palate.

Difficulty in mastication, difficult to suck breast milk, nasal accent in voice, improper pronunciations of words, increased risk of Rhinitis

What are the three parts of the tongue?

Tip (apex), Body & Root (Base)

What are the functions of the tongue?

Swallowing & chewing, taste, speech, diagnostic purposes

What is the vallecula?

Space between tongue and epiglottis

What does the sulcus terminalis divide?

Dorsal surface into Anterior ⅔ (oral) & posterior ⅓ (pharyngeal) parts

What is the foramen cecum?

Central foramen in the sulcus terminalis

What is the anatomical significance of the foramen cecum?

Remnant of the thyroglossal duct

What do the anterior 2/3 of the tongue contain?

Lingual papillae, some with taste buds

What does the posterior 1/3 of the tongue contain?

Lymphatic follicles called lingual tonsils

Where does the submandibular gland open?

Sublingual papilla

Where do the ducts of sublingual glands open?

Sublingual fold

Which extrinsic muscle protrudes the tongue?

Genioglossus