LG #4 Oral Cavity

Oral Cavity

Anterior & Lateral Boarders = Teeth

Floor = Mylohyoid

Roof = Hard/Soft Palates

Posterior = Arches

Buccal Vestibule

Between teeth and cheeks

- Houses parotid duct

Labial Vestibule

between the teeth and lips

Hard Palate

Composed of maxilla and palatine bones

Incisive foramen

nasopalatine nerve

Greater Palatine Foramen

Greater palatine VANS

Lesser Palatine Foramen

lesser palatine VANS

Palatoglossus Muscle

Elevates posterior tongue

Depresses soft palate

constricts isthmus of fauces (opening to oropharnyx)

- Vagus Nerve

Palatopharyngeus Muscle

Tenses soft palate

moves pharynx anterosuperiorly during swallowing

- Vagus Nerve

levator veli palatini

Elevates soft palate during swallowing and yawning

- Vagus Nerve

Tensor veli palatini

tenses soft palate (pulls laterally)

opens aperture of pharyngotympanic (auditory) tube during yawning

- Trigeminal (Mandibular V3)

Musuclus Uvulae

Shortens uvula, pulls it superiorly

- Vagus Nerve

Genioglossus

Bilateral: Protracts tongue to stick apex out of mouth, depresses central part of tongue

Unilateral = Deviates tongue to contralateral side

Innervation - Hypogossal N

Hyoglossus

Depress and shorten tongue

Innervation - Hypogossal N

Styloglossus

Retracts tongue, curls/elevates the side, works with genioglossus to form central "trough" for drinking

Innervation - Hypoglossal N

Terminal Sulcus of the Tongue

groove behind the V-shaped vallate papillae

Lingual Sulcus

runs anteriorly along the midline of the tongue dorsum

Circumvallate Papillae

- Taste buds

- back of tongue

Foliate Papillae

- Taste buds

on side walls of tongue

filliform papillae

- Sensory NOT taste

Fungiform papillae

- Taste buds

Palatine Tonsils

located between the anterior (Palatoglossus) and posterior (Palatopharyngeus) arches

- most susceptible to tonsillitis and stones

Lingual Tonsils

back of tongue

pharyngeal tonsils (adenoids)

Found in posterior nasal cavity

Tubal Tonsils

Posterior to the openings of the auditory tubes into the pharynx

Parotid Gland

salivary gland within the cheek, just anterior to the ear

- Sympathetic = superior cervical ganglion

- Parasympathetic = Glossopharyngeal N

- Sensory = Auriculotemporal Nerve (CN V3)

Parotid (Stensen's) Duct

Travels w/ buccal nn.

- empties into the buccal vestibule at the level of the second upper molar via the parotid papilla

- Pierces Buccinator to get into mouth

Submandibular Gland

Smaller salivary gland located under the jaw

- Supplied by facial aa. & vv.

- Sympathetic = Superior cervical ganglion

- Parasympathetic = Facial n. via chorda tympani to submandibular ganglion

Submandibular (Wharton's) Duct

Submandibular & Sublingual glands

- Located next to sublingual caruncle

Sublingual Gland

salivary gland under the tongue

- Supplied by lingual and facial aa. & vv.

- Sympathetic = Superior cervical ganglion

- Parasympathetic = Facial n. via chorda tympani to submandibular ganglion