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 nerves Innervates stylopharyngeus muscle?
The glossopharyngeal nerve contains both motor and sensory fibers. The motor fibers innervate the stylopharyngeus muscle. The sensory portion of the nerve innervates the posterior third of the tongue, palatine tonsil, and the mucous membranes of the mouth and pharynx.
What is the correct action of the stylopharyngeus muscle?
The stylopharyngeus: elevates the larynx. elevates the pharynx. dilates the pharynx to permit the passage of a large food bolus, thereby facilitating swallowing.
What do the stylopharyngeus and the salpingopharyngeus muscles do?
Salpingopharyngeus is a longitudinal muscle that contributes to the muscular wall of the pharynx. Together with the stylopharyngeus and palatopharyngeus, it belongs to the inner longitudinal group of pharyngeal muscles. This muscle aids speech and swallowing by shortening and widening the pharynx.
Is stylopharyngeus skeletal muscle?
The glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle. This cranial nerve has mostly sensory fibers, but provides motor innervation to one skeletal muscle, the stylopharygeus muscle.
Is the stylopharyngeus a constrictor?
Stylopharyngeus is covered superficially by the external, circular pharyngeal constrictor muscles (superior, middle and inferior). These contain an internal fascial lining (pharyngobasilar fascia) which is closely related to stylopharyngeus.
Where is palatopharyngeus muscle?
The palatopharyngeus is a muscle of both the soft palate and the pharynx. Anteriorly, the muscle fibers are attached to the hard palate, and posterior fibers are attached to the palatine aponeurosis. The anterior portion of the muscle is separated by the levator veli palatini (LVP).
Where is Stylopharyngeus located?
The stylopharyngeus muscle is in the head and neck region, and one of the inner longitudinal muscles of the pharynx.
What does the glossopharyngeal nerve do?
The glossopharyngeal nerve is the ninth set of 12 cranial nerves (CN IX). It provides motor, parasympathetic and sensory information to your mouth and throat. Among its many functions, the nerve helps raise part of your throat, enabling swallowing.
What is the palatoglossus?
The palatoglossus muscle, also known as musculus palatoglossus, is among the four extrinsic muscles of the tongue and the paired muscles of the soft palate. The right and left palatoglossus muscles create ridges in the lateral pharyngeal wall, referred to as the palatoglossal arches (anterior faucial pillars).
What is the styloglossus muscle?
The styloglossus muscle is a paired extrinsic muscle of the tongue. It coordinates with the other extrinsic muscles of the tongue, including the hyoglossus muscle, the genioglossus muscle, and the palatoglossus muscle, to produce the various movements of the tongue.
How do you test the glossopharyngeal nerve?
The glossopharyngeal nerve provides sensory supply to the palate. It can be tested with the gag reflex by touching the pharynx with a tongue depressor or by touching the arches of the pharynx.
What is Killian dehiscence?
The Killian dehiscence is a triangular-shaped area of weakness in the muscular wall of the pharynx, between the transverse and oblique bundles of the inferior pharyngeal constrictor 1. It is the most common site of pharyngeal diverticula 5.
