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o

inferior to foramen: otic ganglion

Mouth and Tongue

vestibule: U-shaped space

o

boundaries

external: lips and cheeks

internal: teeth and gums

o

teeth and gums separate vestibule from oral cavity proper

posterior to last molar tooth: communication b/w vestibule and oral cavity

frenulum of lips: folds of mucosa attaching lips to gums in median plane

orifice of parotid duct: opening opposite 2nd superior molar tooth

oral cavity proper

o

borders:

lateral and anterior: teeth and gums

superior: hard palate

inferior: tongue

posterior and lateral: palatoglossal arch 9border b/w oral cavity and oropharynx)

o

sublingual region: inferior to mobile portions of tongue

o

frenulum linguae: connecting tongue to floor of mouth

o

deep lingual veins: each side of frenulum

o

opening of submandibular duct: each side of root of frenulum

o

plica sublingualis: overlying superior border of sublingual salivary gland

sublingual ducts open onto plica

sublingual region

mylohoid origin: inferior to sublingual fossa of mandible

sublingual salivary gland

o

enveloped in sheath of areolar tissue—fixes gland to floor of mouth

o

12 ducts open in summit of plica

submandibular duct

o

diagonally across medial aspect of sublingual gland

o

goes anteriorly to papilla just lateral to frenulum linguae

o

goes posteriorly to submandibular salivary gland

lingual nerve

o

posterior to last molar tooth

o

runs b/w ramus of mandible and medial pterygoid

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spirals around submanidbular duct

lateral & superiorinferiorinferior & medial superior and medial

o

divides into branches to tongue

o

lie in submucosa of anterior 2/3 of tongue

submandibular ganglion

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vicinity of 3rd molar tooth

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suspended by lingual nerve

hypoglossal nerve

o

b/w submandibular gland and hyoglossus, v. inferior to lingual nerve

tongue

o

mylohyoid: attaches to hyoid bone

o

hyoglossus: sits under mylohyoid near hyoid gland

o

hypoglossal nerve and lingual nerve crosses hyoglossus

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lingual artery: medial to hyoglossus

sends branches to sublingual gland

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styloglossus

from styloid process to lateral aspect of tongue

interdigitate with hyoglossus

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genioglossus and geniohyoid

geniohyoid: attached to hyoid bone

genioglossus:

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