Oral Cavity Flashcards
The circumvallate papillae divide the tongue into the anterior two thirds, called the ________, and the posterior third, called the _________.
Anterior two thirds = oral tongue
Posterior third = tongue base
The oral tongue is in the oral cavity.
The tongue base is in the oropharynx.
What are the major structures within or forms the boundaries of the oral cavity?
A. The hard palate, superior alveolar ridge, and teeth above
B. The cheek laterally
C. The anterior tonsillar pillars and circumvallate papillae posteriorly
D. The mylohyoid muscle (floor of the mouth), inferior alveolar ridge, and teeth inferiorly
E. The oral tongue sits as the centrepiece
All surfaces of the oral cavity structures are covered with mucosa. What type of epithelium?
Nonkeratinized, stratified, squamous epithelium
Within the oral cavity are two major spaces and a third major area. What are these areas?
Sublingual space (SLS)
Submandibular space (SMS)
Mucosal area
Although it seems to describe multiple structures in the low oral cavity, this term is synonymous with mylohyoid muscle.
Floor of the mouth
The mylohyoid muscle is the “lavatory ani” of the oral cavity, serving as a muscular hammock strung between the medial aspects of the mandibular bodies.
It separates the SLS from the SMS, except along its posterior margin.
This term is used to describe the deep muscles of the oral cavity, including the genioglossus and geniohyoid muscles, and the posterior SLS.
Root of tongue
The posterior third of the tongue is the tongue base, which is primarily made up of what structure?
Lingual tonsil
This term has been used to described the combined areas represented by the SLS and SMS.
Submaxillary space
Subepithelial collections of minor salivary glands are found throughout the oral cavity.
The most common locations of minor salivary glands in the oral cavity are seen where?
On the inner surface of the lip, buccal mucosa, and the palate.
The sublingual space is found superomedial to what muscle?
mylohyoid muscle
What is the fascial margins of the sublingual space?
There is no true lining of the sublingual space
What are the contents of the sublingual space?
Anterior extension of the hyoglossus muscle
Nerves - Lingual nerve and cranial nerves IX and XII
Lingual artery and vein
Sublingual glands and ducts
Deep portion of submandibular gland
Submandibular gland duct (i.e., Wharton’s duct)
What are the extent and boundaries of the sublingual space?
The SLS sits in the oral tongue between the mylohyoid muscle inferolaterally and the genioglossu-geniohyoid complex medially.
SLS runs into the mandible anteriorly
SLS empties posteriorly into the posterosuperior aspect of the submandibular space
This space is located inferolateral to the mylohyoid muscle and superior to the hyoid bone.
Submandibular space (SMS)
What fascial margin separates the posterior SMS and SLS from the inferior parapharyngeal space?
None
