What is the palatopharyngeal arch?
: the more posterior of the two ridges of soft tissue at the back of the mouth on each side that curves downward from the uvula to the side of the pharynx forming a recess for the palatine tonsil as it diverges from the palatoglossal arch and that is composed of part of the palatopharyngeus with its covering of mucous …
What is the function of the palatoglossus muscle?
The palatoglossus muscle functions to elevate the posterior portion of the tongue. It also draws the soft palate inferiorly, thereby narrowing the diameter of the oropharyngeal isthmus.
What is the palatoglossal arch made of?
The palatoglossal arch (glossopalatine arch, anterior pillar of fauces) on either side runs downward, lateral (to the side), and forward to the side of the base of the tongue, and is formed by the projection of the glossopalatine muscle with its covering mucous membrane.
What are the fauces of the mouth?
The fauces, isthmus of fauces, or the oropharyngeal isthmus, is the opening at the back of the mouth into the throat. It is a narrow passage between the velum and the base of the tongue. Each arch runs downwards, laterally and forwards, from the soft palate to the side of the tongue.
What forms Passavant’s Ridge?
The Passavant cushion or ridge is a small prominence in the posterior pharynx, formed from a focal bulge of the superior pharyngeal constrictor muscles during swallowing.
What is the palatopharyngeal sphincter?
The palatopharyngeal sphincter consists of skeletal muscle fibers of the most superior aspect of the palatopharyngeus muscle. The fibers form an incomplete circle along the lateral and posterior walls of the nasopharyngeal isthmus at the level of the C1 vertebra.
Why is palatoglossus innervated by vagus?
The vagus nerve, which is also known as the 10th cranial nerve (CN X), is the nerve that supplies the palatoglossus muscle with electrical impulses from the brain. Once this muscle receives electrical impulses from the brain, it will contract, pulling the back of the tongue upward and the soft palate downward.
What is the insertion of the palatoglossus?
Palatoglossus arises from the palatine aponeurosis of the soft palate, where it is continuous with the muscle of the opposite side, and passing downward, forward, and lateralward in front of the palatine tonsil, is inserted into the side of the tongue, some of its fibers spreading over the dorsum, and others passing …
Is palatoglossus paired?
The palatoglossus muscle is one of the four extrinsic muscles of the tongue. The paired muscles create ridges of mucous membrane in the lateral pharyngeal wall called the palatoglossal arches (also known as the anterior pillars of the fauces). It is also referred to as one of the five paired muscles of the soft palate.
What are the Faucial Arches?
The right and left palatoglossus muscles create ridges in the lateral pharyngeal wall, referred to as the palatoglossal arches (anterior faucial pillars). These pillars separate the oral cavity and the oropharynx — the muscle functions as an antagonist to the levator veli palatini muscle.
What is frenulum linguae?
The lingual frenulum is a fold of mucus membrane that’s located under the center portion of your tongue. The lingual frenulum helps to anchor your tongue in your mouth. It also works to stabilize the movements of the tongue. Because of this, it’s important for functions such as speech, eating, and swallowing.