It is the uppermost and thinnest of the three pharyngeal constrictors. Its primary action is constriction of the pharynx (in coordination with the middle pharyngeal constrictor and the inferior pharyngeal constrictor muscles) to deliver a bolus of food into the oesophagus. The superior pharyngeal constrictor muscle is a quadrilateral muscle of the pharynx. The superior pharyngeal constrictor muscle is one of the pharyngeal constrictor muscles. Margin status may be ideally determined by the integrity of the SPC muscle in future oncologic studies, rather than an adequate distance measurement. Citation, DOI, disclosures and article data. Conclusion: Due to the limited width of the SPC muscle, a margin in excess of 2 mm may not be attainable in a transoral radical tonsillectomy. The mean distance from tonsil carcinoma to the lateral specimen margin was 1.79 ± 1.39 mm. The mean minimum width for oncologic specimens was 0.76 ± 0.46 mm. It arises from the lower third of the posterior margin of the medial pterygoid plate and its. The mean minimum SPC width for all cadaveric specimens was 1.02 ± 0.50 mm. Origin: Medial pterygoid plate, pterygomandibular raph, alveolar process Insertion: Pharyngeal raphe, pharyngeal tubercle Nerve: Vagus nerve Action: Swallowing Description: The Superior constrictor (Constrictor pharyngis superior) is a quadrilateral muscle, thinner and paler than the other two. Results: Six cadaveric and 10 oncologic specimens were analyzed. The thickness of the SPC muscle and relationship to the tonsillar carcinoma were assessed. The superior pharyngeal constrictor muscle is one of three pharyngeal constrictor muscles whose main function is to facilitate the process of deglutition. Specimens were processed using standard histopathologic techniques and were analyzed by a board-certified head and neck pathologist. Pharyngeal muscles in subjects with PD exhibited many atrophic fibers, fiber type grouping, and fast-to-slow myosin heavy chain transformation. Methods: Radical tonsillectomy specimens were collected from cadaveric and oncologic subjects. This study examined the fiber histochemistry of pharyngeal constrictor and cricopharyngeal sphincter muscles in postmortem specimens from 8 subjects with PD and 4 age-matched control subjects. Objective: The aim of this study was to characterize the gross and histologic anatomic features of the palatine tonsil and SPC muscle following an en bloc radical tonsillectomy. ![]() first order logic expression formed as result of function of. Middle constrictor overlaps the superior. neck that participate in feeding, swallowing, and other oral-pharyngeal behaviors. Inferior constrictor overlaps the middle constrictor. ![]() The oncologic margin may be significantly influenced by the morphologic relations and anatomic dimensions of the palatine tonsil and superior pharyngeal constrictor (SPC) muscle. Into the median fibrous raphe on the posterior aspect of pharynx. Introduction: The rise in primary surgical management of oropharyngeal squamous cell carcinoma has led to varying interpretations of the histopathologic evaluation following a radical tonsillectomy.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |