The muscle receives motor innervation from the glossopharyngeal nerve (CN IX). venous drainage: via veins corresponding to the named arteries.arterial supply: pharyngeal branch of the ascending pharyngeal artery, from the ECA.There is an interval between superior pharyngeal constrictor and middle pharyngeal constrictor, this space contains glossopharyngeal nerve, lingual nerve and the stylopharyngeus muscle. Other fibers join the palatopharyngeus muscle to attach onto the posterior border of the thyroid cartilage. The interval between the upper border of the muscle and the base of the skull is closed by the pharyngeal aponeurosis, and is known as the sinus of Morgagni. A few fibers merge with the lateral glossoepiglottic fold and the constrictor muscles. It courses inferiorly adjacent to the pharynx where it flattens out, passing between the superior and middle pharyngeal constrictor muscles. muscle is a long, thin muscle that, as its name suggests, attaches to the styloid process and enters the Muscle CIrCULar LaYer Inferior pharyngeal constrictor. It originates from the medial aspect of the styloid process at the base of the temporal bone where it is cylindrical in shape. action: elevates the larynx and pharynx swallowing Posteriormiddle and inferior constrictor muscles, posterior pharyngeal mucosa supported by the vertebral bodies of C4C6, prevertebral fascia, and the retropharyngeal space.Pharyngeal muscles contracts pushing the food into the esophagus. The middle pharyngeal constrictor muscle is one of the pharyngeal constrictor muscles. The pharyngeal muscles are a group of muscles that act upon the pharynx.
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