![]() 1 As a pharyngeal constrictor muscle, it assists in the swallowing of food (bolus), conveying it downward into the esophagus. Its function is to pull the pharyngeal wall forward and to constrict the pharyngeal diameter. It is innervated by the IX accessory nerve and X vagus via the pharengeal plexus. 2 It is inserted into the median raphe of pharyngeal aponeurosis. The muscle extends inferiorly, traveling along the sides of the pharynx between the superior and middle pharyngeal constrictor. ![]() It originates from the medial base of the styloid process of temporal bone. the pterygopharyngeal part, the buccopharyngeal part, the myolopharyngeal part, and the glossopharyngeal part. The pharynx, a tube-like structure, is a part of the digestive system and is composed of six muscles. Stylopharyngeus muscle is a long, thin muscle that is shaped like a cylinder superiorly and becomes flat inferiorly. The superior pharyngeal constrictor is composed of four parts according to origin (pterygomandibular raphe), i.e. The thyropharyngeal muscle arises from the lateral ala of the thyroid cartilage it courses laterally and posteriorly to merge with its counterpart from the opposite side in a raphe in the posterior pharyngeal wall. The Inferior constrictor (Constrictor pharyngis inferior) the thickest of the three constrictors, arises from the sides of the cricoid and thyroid cartilage. It is located above the other two pharyngeal constrictors, forming a tube beginning at the pterygomandibular raphe. The inferior constrictor muscle is composed of the thyropharyngeal and cricopharyngeal muscles. Morphoanatomically, the superior pharyngeal constrictor is relatively thin and pale. location: within the external fascia of the pharynx 3, mainly over the middle pharyngeal constrictor on the posterolateral wall of the pharynx 4 origin and course: it is formed from the union of branches from the vagus nerve, glossopharyngeal nerve and cervical sympathetic nerves 4,5 branches and supply. The other pharyngeal constrictors are the middle pharyngeal constrictor and the inferior pharyngeal constrictor. The superior pharyngeal constrictor is one of the three constrictor muscles of the pharynx. Inferior salivary nucleus This nucleus contains neurons whose fibers innervate parotid gland. The axons that belong to the glossopharyngeal nerve provide motor innervation to the stylopharyngeus muscle and the superior pharyngeal constrictor muscle. ( anatomy) The quadrilateral muscle in the pharynx, located superior to other pharyngeal constrictor muscles, arises from the pterygomandibular raphe, and inserts into the median raphe The axons of these neurons are distributed to the cranial nerves IX, X and XI.
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