What is the function of the stylopharyngeus muscle?
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.
Why stylopharyngeus is supplied by glossopharyngeal nerve?
As stated above, the glossopharyngeal nerve provides motor innervation to the stylopharyngeus muscle, which is responsible for elevating the pharynx and larynx.
What muscle dilates the pharynx?
stylopharyngeus muscle
Dorsal pharyngeal constrictors During breathing, these muscles have tonic and phasic expiratory activities, that helps to support the nasopharynx. The major dilating muscle of the dorsal nasopharynx is the stylopharyngeus muscle.
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.
What nerve Innervates the Styloglossus?
hypoglossal (XII) nerve
As an extrinsic muscle of the tongue, the styloglossus muscle is innervated by the hypoglossal (XII) nerve.
What is the function of the styloglossus?
The styloglossus muscle acts to lift the lateral edges and to retract the tongue. The hyoglossus muscle causes retraction as well as depression of the tongue. The genioglossus muscle protrudes the tongue. The palatoglossus muscles elevate the posterior part of the tongue.
What is the function of styloglossus?
The styloglossus muscle acts to lift the lateral edges and to retract the tongue. The hyoglossus muscle causes retraction as well as depression of the tongue.
What is the stylohyoid innervated by?
the facial nerve
Innervation. Stylohyoid receives innervation from the stylohyoid branch of the facial nerve (Cranial nerve 7). The branch arises right after the facial nerve passes the mastoid process of temporal bone to enter the middle part of the muscle.
Where is the Stylopharyngeus muscle located?
pharynx
Stylopharyngeus is a paired muscle that participates in forming the lateral walls of the pharynx. It is one of three longitudinal pharyngeal muscles, the remaining ones being palatopharyngeus and salpingopharyngeus muscles. All three are located internally to the circular pharyngeal constrictor muscles.
What are styloglossus and stylohyoid?
The stylohyoid muscle connects to the posterior belly of the digastric muscle in its path. It lies anteromedial to the superior margin of the posterior belly of the digastric muscle. The styloglossus muscle lies medially and anterior to the stylohyoid muscle.