![]() It is the thickest of the three outer pharyngeal muscles. The stylopharyngeus muscle, along with two other styloid muscles, i.e., the styloglossus muscle and the stylohyoid muscle, form the ‘bunch of Riolanus.’ It is the most. The inferior fibers are horizontal and continuous with the circular fibers of the esophagus the rest ascend, increasing in obliquity, and overlap the Constrictor medius. The inferior pharyngeal constrictor muscle is a skeletal muscle of the neck. The stylopharyngeus muscle is a long, slender and tapered longitudinal pharyngeal muscle that runs between the styloid process of the temporal bone and the pharynx and functions during the pharyngeal phase of swallowing. This muscle contraction creates a peristaltic ridge. The superior, middle, and inferior pharyngeal constrictor (PC) muscles form the lateral and posterior walls of the pharyngeal airway. Review the origin of the maxillary artery and its. The posterior attachment of the inferior pharyngeal constrictor muscle is the pharyngeal raphe (Fig. The muscle is described in Grey’s Anatomy text as a large quadrilateral muscle that arises from four heads of origin (see Figure 1). From these origins the fibers spread backward and medialward to be inserted with the muscle of the opposite side into the fibrous raphé in the posterior median line of the pharynx. The food bolus is forced inferiorly from the pharynx into the esophagus after the sequential contraction of the three pharyngeal constrictor muscles (the superior, middle and inferior constrictor muscles), which together make up the external circular layer of the pharynx. The anterior attachments of the inferior pharyngeal constrictor muscle are the oblique line of the thyroid cartilage and the lateral surface of the cricoid cartilage (Fig. The superior pharyngeal constrictor muscle is an unusual skeletal muscle in that it is very dynamic and complex in function. On the thyroid cartilage it arises from the oblique line on the side of the lamina, from the surface behind this nearly as far as the posterior border and from the inferior cornu. From the cricoid cartilage it arises in the interval between the Cricothyreoideus in front, and the articular facet for the inferior cornu of the thyroid cartilage behind. The Inferior constrictor (Constrictor pharyngis inferior) the thickest of the three constrictors, arises from the sides of the cricoid and thyroid cartilage. Nerve: External laryngeal branch of thevagus
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