12/30/2023 0 Comments Inferior pharyngeal constrictor usmle![]() Be able to identify the cranial nerves providing sensory and motor innervation to the pharynxĭISCUSSION The pharynx is a space within the head that connects the oral and nasal cavities to the trachea and esophagus. Be able to identify vessels that supply the pharynx, especially branches that course through the tonsillar beds 5. Be able to describe the components of the tonsillar ring 4. ![]() Be able to list the muscles that form the pharynx 3. Be able to describe the divisions of the pharynx 2. Many other vital vessels, nerves, and structures are adjacent to the tonsils, and care must be taken to avoid injury.ĪPPROACH TO: The Tonsils Objectives 1. As the swelling decreases, so does the nerve impairment. Compression of glossopharyngeal nerve branches causes a temporary loss in taste sensation on the posterior aspect of the tongue. Even if a direct injury does not occur, compression from edema may cause temporary injury as in this case. The tonsillar bed is extremely vascular with the most common source of intraoperative bleeding from the external palatine vein, which arises from the lateral aspect of the tonsillar bed. A thorough understanding of the anatomy of the pharynx is necessary in order to limit complications. Although tonsillectomy is regarded as a routine procedure, it is not without complications and risks. A focal weakness or deficiency in this area of the pharyngeal wall is termed a Killian dehiscence and can produce a pulsion-pseudodiverticulum, known as a pharyngeal diverticulum or pouch (Zenker diverticulum).I 58 clinical cases with basic science discussions and clinical correlations Anatomy pearls highlight l4 episodes per year), tonsillectomy may be indicated. The area of the pharyngeal wall at the junction between the thyropharyngeus and the cricopharyngeus is a potentially weak area.
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