Oral Cavity And Pharynx Flashcards
Hard Palate is which part of mouth? Soft palate?
Anterior 2/3; posterior 1/3
What is the opening of oral cavity to oropharynx?
Fauces
What are the two folds that separate the oral cavity from oropharynx? What is in between the folds?
The glossopalatine fold is in front, with palatine tonsils in middle, followed by pharyngopalatine fold next
What connects tongue to oral cavity?
Lingual Frenulum
What is important about lingual frenulum?
If it is too short, babies can have issues with breastfeeding and talking
What is on posterior surface of tongue?
Lingual tonsils
Parotid Gland-location and where it runs
Over masseter, runs duct through buccinator m into oral cavity behind 2nd molar
Submandibular glands-Location and runs where?
Under mandible, duct through papilla in floor of mouth to lateral sides of lingual frenulum
Sublingual glands: location and where they run
Inferior of tongue, tiny sublingual ducts that open onto inferior oral cavity
Function of Saliva
Moistens food,
helps break down,
Abs present,
Food dissolved
Teeth-Enamel?
Cap over dentin-what we see in our mouth
Teeth-roots?
Run from pulp, located within dentin.
-run into dental alveolus containing n, a, v
Periodontal Ligament
Connects dentin to alveolar canal
How many teeth do you start with? How many do you end with?
Start with 20 deciduous teeth, end with 32 permanent teeth
-last ones are wisdom teeth, in early 20s
Muscles of cervical Viscera
Levator veli palatini-elevates soft palate
-CN X (PA4)
Tensor Veli Palatini-tenses soft palate
-CNV3 (PA1)
Stylopharyngeus-elevates pharynx
-CN IX-(PA3)
Superior, Middle and Inferior pharyngeal constrictor
-CNX (PA4)
Where is the Superior Pharyngeal Constrictor in relation to buccinator?
The pterygopharyngeal raphe separate the two, so the buccinator is more anterior
Tonsillectomy
There are a lot of arteries and nerves around here, main one is glossopharyngeal behind!
A lot of times dentist will take out pharyngeal tonsils as well
What is behind palatine tonsils?
Glossopharyngeal N
What happens if you have paralysis of palatini muscles?
So Tensor veli palatini and Levator veli palatini tense and pull up your soft palate to protect your nasopharyngeal cavity/pharyngotympanic tube
-IF CN IX or X are affected, these muscles don’t work and end up with food in reflux
Stages of Swallowing
- Bolus compressed and pushed into oropharynx
- voluntary-tongue and soft palate - Soft palate elevated (Levator veli palatini), pharynx widens and shortens as suprahyoid m and pharyngeal muscles contract
- involuntary - Sequential Contraction of pharyngeal constrictors to move food down esophagus
—CNX
Pharyngeal Plexus provides sensation to?
Oropharynx and Laryngopharynx by IX and X
Nasopharynx and pterygotympanic tube and torus tuberus get sensation from?
CN V2
