A supernumerary variation of the pharyngeal muscles - a case report

  • Álvaro Rezende Teixeira Morphology Department, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.
  • André Limongi Ráfare Morphology Department, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.
  • Carlos Alberto Araujo Chagas Morphology Department, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.
  • Lucas Alves Sarmento Pires Morphology Department, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.
Keywords: pharynx, pharyngeal muscles, superior constrictor muscle, variations

Abstract

The pharynx is a complex region and it partly possesses a muscular architecture. The classical textbooks divide them into the constrictors (superior, middle and inferior) and elevators (palatopharyngeus and stylopharyngeus) muscles, which are very significant to pharyngeal physiology and its main function: swallowing. Despite that, little is known regarding the anatomical variations of these muscles. We present a rare case in which a longitudinal and bilateral bundle arose from the basilar portion of the occipital bone near the pharyngeal tubercle and went towards the fibers of the inferior constrictor muscle and blended with them. We believe that this is an aberrant slip of the superior constrictor muscle, although there is no sufficient data to support this hypothesis. Similar variations have been described, but after thorough research, we believe that the one described herein was not previously reported. Variations of the pharyngeal muscles may lead to alterations in its function, thus, should be further studied and reported.

Published
2019-08-01
How to Cite
Teixeira, Álvaro, Ráfare, A., Chagas, C., & Pires, L. (2019). A supernumerary variation of the pharyngeal muscles - a case report. Acta Scientiae Anatomica, 1(3), 161-163. Retrieved from http://actasanatomica.com/journal/index.php/asa/article/view/54