The most common pathogen causing peritonsillar cellulitis/abscess is GABHS. Peritonsillar infection, also known as ‘Quincy's angina’, is an infection located between the tonsil and the superior pharyngeal constrictor muscle. Menachem Gross, Ron Eliashar, in Orofacial Pain and Headache, 2008 4.3 Peritonsillar Cellulitis and Abscess Anderson with oropharyngeal wall squamous carcinomas between 19 was 57%. The incidence of nodal involvement at presentation among 164 patients referred to M.D. A CT scan of an oropharyngeal wall tumor is shown in Figure 11-6. Tumors of the lateral pharyngeal wall extend anteriorly and posteriorly along the mucosa and parapharyngeal space, can grow as exophytic masses into the pharyngeal cavity, and in advanced stages, can directly invade the neck. However, invasion through the prevertebral fascia and into the vertebral bodies is rare. Tumors of the posterior oropharyngeal wall usually grow anteriorly into the pharyngeal cavity and posteriorly into the prevertebral muscles. Located behind the epithelium of the posterior pharyngeal wall are the retropharyngeal space, the longus capitis and longus colli muscles, the prevertebral fascia, and the vertebral bodies. The lateral and posterior oropharyngeal walls consist of squamous epithelium overlying the superior and middle pharyngeal constrictor muscles. Kian Ang, in Radiation Oncology (Ninth Edition), 2010 Oropharyngeal Walls The blood from this region is drained by the pharyngeal venous plexus which ends in the internal jugular vein.William H. The majority of the superior pharyngeal constrictor is supplied from the pharyngeal branch of ascending pharyngeal artery, while the smaller part of the muscle receives blood through the tonsillar branch of facial artery. Superior pharyngeal constrictor receives innervation from the pharyngeal branch of vagus nerve, via the pharyngeal plexus. Together with the buccopharyngeal fascia, it makes the lateral border of peritonsillar space, a potential space surrounding the palatine tonsils. It makes the medial border of the parapharyngeal space, a potential space above the hyoid bone. Superior pharyngeal constrictor bounds important features of the neck compartment. The superior constrictor is covered by the buccopharyngeal fascia which separates it from the retropharyngeal space located posteriorly. The pharyngeal artery passes on the superior border of the muscle, while the tonsillar artery penetrates the superior constrictor of the pharynx at the upper border of styloglossus muscle. The inferior part of the muscle is separated from the middle pharyngeal constrictor muscle by a small space that contains stylopharyngeus muscle and the glossopharyngeal nerve. The slit that contains levator veli palatini muscle, the pharyngotympanic tube and an upward projection of pharyngobasilar fascia separates the superior border of the superior constrictor muscle from the base of the skull. The superior constrictor muscle is located anterior to the prevertebral muscles and posterior to the buccinator muscle, from which it is separated by the pterygomandibular raphe. Pharyngeal branch of ascending pharyngeal artery, tonsillar branch of facial artery Pharyngeal tubercle on basilar part of occipital boneĬonstricts wall of pharynx during swallowing Pterygoid hamulus, pterygomandibular raphe, posterior end of mylohyoid line of mandible, the tongue Key facts about the superior pharyngeal constrictor muscle This article will discuss the anatomy and function of the superior pharyngeal constrictor muscle. This muscle has a complex morphology, as it consists of four parts Īpart from its role in deglutition, the superior pharyngeal constrictor muscle is an important anatomical landmark bounding some of the main compartments of the neck, such as peritonsillar and parapharyngeal space. Superior pharyngeal constrictor muscle is one of three pharyngeal constrictor muscles whose main function is to facilitate the process of deglutition. Superior pharyngeal constrictor (musculus constrictor pharyngis superior)
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