Oral Cavity Flashcards
Oral Vestibule
Area between dental arches, lips and cheeks
Oral cavity proper
lies within the confines of the teeth
Buccinator O and I
O= Pterygomandibular Raphe I= with orbicularis oris on lips
What Mm. make up floor of oral cavity?
Mylohyoid and Geniohyoid
What mucosa is the palate covered by superiorly and inferiorly
superiorly = nasal inferiorly = oral
What is the suture in the palantine bone called?
intermaxillary
Name the 4 muscles of the palate
Leavtor Veli Palatini
Musculus Uvula
Palatoglossus
Palatopharyngeus
What nerve innervates all the palatine muscles>
Vagus
What plexus is the palantine muscles associated with?
pharyngeal plexus
What are the actions of LV palentini?
Acts to allow passage of air.
will elevate SOFT palate during yawning and breathing and tense it during swallowing
Which muscle acts to tense the soft palate and elevate the pharynx during swallowing?
Platopharyngeus
What is the function of palatoglossus?
draws soft palate towards tongue and allow expired air to pass through nose.
name the 4 extrinsic tongue muscles
Hyoglossus
Genioglossus
Styloglossus
Palatoglossus
Extrinsic tongue muscles neumonic
Harry
Potter
Slytherine
Gryiffindor
Which is the only extrnisic tongue muscle not to be innervated by CN XII?
Palatoglossus (CN X)
Where does genioglossus orginate from?
Mandible
Name the 3 intrinisc tongue muscles
Longitidunal
Transverse
Verticle
What nerve is the intrinsic tongue muscles innervated by?
CN XII
What is the function of the vertical tongue msucles?
Flatten and widen the tongue
Name the vascularisation of the tongue and what they branch from?
Lignual Aa. (External carotid) Lingual Vein (Internal jugular)
Are salvitory glands GVE or GVA?
GVE
What CN nucleus and ganglion are associated with the submandibular and sublingual glands?
Superior salvitory nucleus
Submandibular ganglion
CN VII
Describe the innervation of parotid
innervated by CN IX by the inferior salvitory nucleus at the OTIC ganglion.
What nerve peirces the salvitory nucleus but doesnt innervate it?
CN VII
Where does parotid open into oral cavity
2nd upper molar
OTIC meaning and why this is relevent to the parotid gland?
Otic ganglion innervates parotid gland.
otic means ear, parotid is located behind the ear.
How many baby teeth?
20
how many adult teeth?
28-32
What can sinus pain indicate?
toothache
Edentulism meaning?
Loss of teeth and reabsorption of alveolar bone
Describe vascularisation of the teeth
maxillary teeth - superior alveolar Aa. and vein
Mandibular = inferior
Describe the innervation of teeth
Maxillary teeth = superior alveolar CN V, 2
Mandibular teeth = inferior aveolar, CN V , 3
