Middle Pharyngeal Constrictor

Description

Dominating the lateral neck is the middle pharyngeal constrictor, a fan-shaped sheet arising from the greater and lesser horns of the hyoid bone and sweeping posteriorly to the median pharyngeal raphe. Superior to its upper border lie the inferior fibers of the superior pharyngeal constrictor, while its inferior margin overlaps the upper part of the inferior pharyngeal constrictor at the level of the thyrohyoid membrane. Anteriorly, the muscle blends with the pharyngeal wall deep to the tongue base and suprahyoid region, with the mandible and lower skull providing bony orientation, and cervical vertebrae forming the posterior skeletal axis. Functionally, the middle pharyngeal constrictor narrows the pharyngeal lumen during the pharyngeal phase of swallowing, moving the bolus inferiorly toward the esophageal inlet in coordination with palatal elevation and laryngeal excursion. This lateral perspective helps clarify the clinically relevant overlap zones between constrictors and the relationship to the hyoid complex, where postoperative scarring after hyoid suspension, neck dissection, or transoral procedures can contribute to dysphagia. The fibers also sit under the influence of the pharyngeal plexus (predominantly vagal motor), a practical teaching point when correlating unilateral pharyngeal weakness with cranial nerve pathology. Short and thick. Medical educators will find it well suited for head and neck anatomy labs, speech-language pathology modules on deglutition biomechanics, and otolaryngology teaching materials describing pharyngeal wall musculature during endoscopic swallow evaluation and surgical planning. Medical publishers can pair it with diagrams of the superior and inferior constrictors to explain sequential pharyngeal propulsion in a single glance. Anatomical accuracy verified by SciePro's Medical Advisory Board.