What nerve Innervates the Palatoglossus?

What nerve Innervates the Palatoglossus?

All the other muscles of the tongue derive from the occipital myotomes. This is the reason that all the other tongue muscles receive innervation from the twelfth cranial nerve (hypoglossal nerve) except the palatoglossus muscle, which is innervated by the tenth cranial nerve (vagus nerve).

What nerve controls the uvula?

Cranial nerve X – Vagus nerve The pharyngeal branch travels between the internal and external carotid arteries and enters the pharynx at the upper border of the middle constrictor muscle, supplying levator veli palatini, salpingopharyngeus, palatopharyngeus and the uvula.

What nerve Innervates the Styloglossus?

The styloglossus muscle draws up the sides of the tongue to create a trough for swallowing following adequate mastication. The pair of styloglossus muscles work together on each side to retract the tongue. The styloglossus muscle is innervated by the hypoglossal nerve (CN XII).

What are Faucial pillars made of?

The posterior faucial pillar is formed by the palatopharyngeal muscle. It originates from the posterolateral part of the soft palate and runs downward and laterally to insert into the pharyngeal constrictor muscle and the thyroid cartilage of the larynx.

What is the insertion of the Palatoglossus muscle?

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 …

What nerve damage causes uvula deviation?

Central lesions of the vagus nerve can cause dysphagia, dysarthria and hoarseness; uvula deviation (towards the opposite side of the lesion); and transient parasympathetic effects.

What does the Stylopharyngeus do?

The stylopharyngeus muscle act as a significant dilating muscle of the nasopharynx. During breathing, the contraction of this muscle pulls the nasopharyngeal wall dorsally. This action prevents the dynamic collapse of the dorsal wall of the nasopharynx by supporting the wall during inspiration.

What does the Palatopharyngeus do?

It attaches superiorly to the hard palate and palatine aponeurosis and inferiorly to the lateral wall of the pharynx. Its function is to tense the soft palate and pull the pharyngeal walls superiorly, anteriorly, and medially during swallowing, effectively closing off the nasopharynx from the oropharynx.

What does the styloglossus do?

Action. The styloglossus draws up the sides of the tongue to create a trough for swallowing. As a pair they also aid in retracting the tongue.

What nerve innervates the palatoglossus?

The palatoglossus is the only tongue muscle supplied by the vagus nerve; the remaining muscles are supplied by cranial nerve XII. The palatoglossus muscle originates in the soft palate and passes through the tongue in a transverse fashion. Together with the styloglossus muscle, it acts to elevate the posterior tongue.

How does the palatoglossus muscle work?

In order for a muscle to move or contract, it must receive electrical impulses from the brain through a specific nerve or group of nerves (this process is called ‘innervation’). The palatoglossus muscle receives electrical impulses from the brain through the vagus nerve, which is also known as the 10th cranial nerve (CN X).

Is the palatoglossus innervated by XI hitchhiking on X?

Other sources state that the palatoglossus is not innervated by XI hitchhiking on X, but rather it is innervated by IX via the pharyngeal plexus formed from IX and X. Elevates posterior tongue, closes the oropharyngeal isthmus, and aids initiation of swallowing.

What does the vagus nerve innervate in the pharynx?

In addition to the pharynx and larynx, the vagus nerve also innervates the palatoglossus of the tongue, and the majority of the muscles of the soft palate. In the thorax and abdomen, the vagus nerve is the main parasympathetic outflow to the heart and gastro-intestinal organs.