The superior pharyngeal constrictor muscle is innervated by the pharyngeal branch of the vagus nerve via the pharyngeal plexus. 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.Īs soon as the bolus of food is received in the pharynx, the elevator muscles relax, the pharynx descends, and the constrictors contract upon the bolus, and convey it downward into the esophagus. The inferior pharyngeal constrictor (IPC) originates from the thyroid and cricoid cartilages and inserts to the pharyngeal raphe. A fourth cricothyropharyngeus muscle arises from the cricoid arch until it crosses the inferior constrictor muscle, in particular, the cricolaryngeal portion. The superior fibers arch beneath the levator veli palatini muscle and the Eustachian tube. pierces the inferior pharyngeal constrictor muscle at the level of the inferior thyroid tubercle to enter the cricothyroid muscle. Study with Quizlet and memorize flashcards containing terms like Pharyngeal. Inferior pharyngeal constrictor( 3 separate muscles) Thyropharyngeus, superior cricopharyngeus, inferior cricopharyngeus. As the name implies, the thyropharyngeus originates from the thyroid cartilage and inserts into the pharyngeal raphe. is composed of the overlapping tendons of the muscles is at midline on the posterior ph.wall. descends posterior to the superior thyroid artery. The inferior pharyngeal constrictor muscle is separated into two separate muscles, the thyropharyngeus and cricopharyngeus, because they have different origins, insertions, and functions. The fibers curve backward to be inserted into the median raphe, being also prolonged by means of an aponeurosis to the pharyngeal spine on the basilar part of the occipital bone. origin: arises as the smaller of the two branches of the superior laryngeal nerve at the level of the greater cornu of the hyoid bone. Action: Constricts the wall of the pharynx during. It inserts posteriorly onto the pharyngeal raphe. Attachments: Originates from the stylohyoid ligament and the hyoid bone. It is the middle of the three pharyngeal constrictor muscles, and is located within the laryngopharynx. and by a few fibers from the side of the tongue ( Glossopharyngeal part) The middle pharyngeal constrictor is a muscle of the pharynx. from the alveolar process of the mandible above the posterior end of the mylohyoid line ( Myolopharyngeal part) from the pterygomandibular raphe ( Buccopharyngeal part) the lower third of the posterior margin of the medial pterygoid plate and its hamulus ( Pterygopharyngeal part) The four parts of this muscle arise from:
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