The Oral Cavity, Palate and Oropharynx Flashcards
The vestibule of the oral cavity refers to the space between what?
Teeth, lips and cheeks
The muscle innervated by the Facial nerve that lies in the lateral walls of the oral cavity is??
The buccinator
The muscle of facial expression whose contraction causes closing/pursing of the lips is
Orbicularis oris
The posterior opening of the oral cavity is called the oropharyngeal?
Isthmus
What is the roof of the mouth made up of?
Hard palate posterior to which is the soft palate
Which two bones form the hard palate?
Maxilla
Palatine bone
Name the muscles in the soft palate
- Tensor veli palatini*
- Levator veli palatini*
- Palatoglossus*
- Palatopharyngeuas*
- Musculus uvulae*
What is the nerve supply to these muscles?
All Pharyngeal branch of CN X – except Tensor veli palatini which is by nerve to medial pterygoid (branch of CN V3)
What is the collective action of these muscles?
Swallowing – closing off the nasal passage
What is the oropharynx?
Part of the pharynx lies behind the mouth and tongue
Anterior boundaries of the oropharynx?
Its anterior boundaries are the right and left palatoglossal arches (anterior pillars of the fauces) and it extends from the uvula of the soft palate above to the tip of the epiglottis below.
What are the important contents of the oropharynx?
Palatine tonsils situated in the lateral wall on either side.
Folds of mucosa overlying the palatoglossus and palatopharyngeus muscles. In life, what lymphoid structure lies between these two folds?
Palatine Tonsils
What type of cellular tissue makes up the palatine tonsil structure?
Mucosa associated with Lymphoid Tissue (MALT)
