Floor Of Mouth Flashcards
What is the posterior border of the oral cav
Oropharyngeal isthmus - space bounded laterally by palatoglossal folds
What does the roof of the oral cav consist of
Hard and soft palate
What does the floor of the oral cav consist of
Tongue
Muscles of mouth
What bones makeup palate
2 palatine
2 maxilla
How many pairs of what muscles does the soft palate consist of
5 pairs of skeletal muscle
What are the landmarks of the lips
Upper and lower labial sulcus
What is the palatal mucoperiosteum
Covers hard palate
Don’t have mucosa associated with underlying skeltL muscle but closely related to bone
What is the lingual sulcus
Deepest part of area between tongue and teeth
What is the buccal sulcus
Deepest part of cheek part of vestibule
What is the difference between upper labial alveolar mucosa and upper labialise mucosa
Upper labial alveolar mucosa - associate with alveolar bone, called this up to the canines then after this point it is known as buccal alveolar mucosa
Upper labial mucosa - not directly associated with alveolar bone
What are the labial frenula
Folds of mucosa
Connect alveolar mucosa to lips
Why is there red and pink mucosa
Red - thinner so oxygenated blood shines through more
Pink - thicker epi
What kind of epithelia is red and pink mucosa
Red - non keratinised stratified squamous
Pink - keratinised stratified squamous
What is the free gingival groove
Between free and attached gingivae - corresponds to base of gingival sulcus
What is attached gingivae and free gingivae
Attached - directly associated with alveolar bone
Free - not stuck to anything but is the superior extent of mucosa over tooth
What is the gingival sulcus
The space where the probe goes
Between the tooth and the free gingivae
What is the mucohingival junction
Transition line between the gingivae and mucosa
What is the sublingual fold
Openings for ducts of sublingual glands
Where is the lingual sulcus
Between the tongue and lower dentition
Deepest part of floor of mouth
What are the sublingual papilla e
Opening for the submandibular gland duct - next to frenulum of tongue
What are the fimbriated folds
From development of the tongue
Embryo logical
No function
How do the mylohyoid muscles join
Bilateral meet in midline by tendons interdigitations - raphe
Where does the geniohyoid attach
From genio tubercles ( mental spines) to hyoid bone
What are the functions of the tongue
Formation of food bolus. Pushing food bolus to posterior part of oral cav ready to swallow Keeping mouth clean Speech Tasting. And sensing food
Which areas of the tongue taste
Sweet/salt
Sourness
Bitterness
Sweet/salt – the tip
Sourness - the sides
Bitterness - the back
What is the terminal sulcus
deep groove dividing anterior and posterior of tongue
What su the vertical part of the tongue
The posterior 1/3rd
Where does the posterior 1/3rd of the tongue sit
In the oropharynx
What is the general sensation and taste innervated by at the posterior tongue
CN IX
What tonsil is found under the mucosa of the posterior tongue
Lingual tonsil
What is e horizontal part of the tone
Anterior 2/3rds
What su the general sensation of the anterior tone
Mandibular div of trigeminal CN v3 and lingual nerve
What gives the taste sensation to the anterior part of the tongue
CN 7 via lingual nerve and chorda tympani
Whatis the foramen caecum
Depression on dorsum of the tongue at the median sulcus
What are the four types of taste buds and what is the innervation of each
Vallate papillae v shape most post - CN IX
Foliate papillae at back on sides - CN VII
Filiform papillae the middle ones - CN V3
Fungiform papillae most anterior - CN VII
What are intrinsic and extrinsic muscles
Intrinsic - originate and insert within the tongue no hard tissue origin/insertion
Extrinsic - originate out with hard tissue structure and insert onto tongue
What are the intrinsic muscles of the tongue
Act to alter the shape of the tongue
Longitudinal muscles - make tongue short and thick
Transverse and vertical muscles - make tongue long and narrow
What is the palatine aponeurosis
Tendons of tensor palate muscles
What are almost all tongue muscles supplied by and what is the exception
CN Xii except palatoglosses which is supplied by CN x
What muscles are used to stick the tongue out
Genio glossus muscles contracting pushing tongue tip forward
How do u clinically assess the CN Xii
Ask out to stick tongue out and if both workin tongue should come out in middle/median
If the tongue goes to a side it’s pointing to the aide which there is a fault
What are the functions of the oral cav
Prep food bolus for swallowing - mastication, teeth, saliva
Defence against ingestion of toxins/infection - tonsils lymphoid tissue, special sense of taste
Speech- oral and nasal sounds (soft palate) and articulation (tongue and lips)
What is the anterior border of the oral cav
Alveolar/dental
Arches of mandible and maxilla
