Levator veli palatini
Muscle of the soft palate
The levator veli palatini is a muscle of the soft palate that plays a crucial role in the function of the pharynx and the auditory tube. It is primarily responsible for elevating the soft palate to prevent food from entering the nasopharynx during swallowing and to equalize pressure in the middle ear during yawning and swallowing.
Anatomy[edit | edit source]
The levator veli palatini originates from the petrous part of the temporal bone and the cartilaginous part of the auditory tube. It descends obliquely to insert into the palatine aponeurosis, which is a fibrous sheet that forms the framework of the soft palate.
Innervation[edit | edit source]
The muscle is innervated by the pharyngeal plexus, which is primarily composed of fibers from the vagus nerve (cranial nerve X). This innervation is crucial for the muscle's function in elevating the soft palate.
Blood Supply[edit | edit source]
The levator veli palatini receives its blood supply from the ascending palatine artery, a branch of the facial artery.
Function[edit | edit source]
The primary function of the levator veli palatini is to elevate the soft palate. This action is essential during swallowing to close off the nasopharynx, preventing food and liquid from entering the nasal cavity. Additionally, the muscle helps open the auditory tube during swallowing and yawning, which equalizes pressure between the nasopharynx and the middle ear.
Clinical Significance[edit | edit source]
Dysfunction of the levator veli palatini can lead to conditions such as velopharyngeal insufficiency, where the soft palate fails to close properly against the posterior pharyngeal wall, resulting in nasal regurgitation during swallowing and hypernasal speech. This muscle may also be involved in Eustachian tube dysfunction, affecting middle ear ventilation and pressure regulation.
Also see[edit | edit source]
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