The glossopharyngeal nerve and pharyngeal branch of the vagus pass between the internal and external carotid arteries. Glossopharyngeal nerve. (G 8.27 N 67 GI 44.29) Attempt to identify the the most external of the three pharyngeal constructor mm. The superior laryngeal nerve passes medial to both the internal and external carotid arteries. ascending pharyngeal a., superior thyroid a., inferior thyroid a. If necessary, trace the superior laryngeal nerve back from its internal laryngeal branch. Superior laryngeal branching from the vagus nerve. The hypoglossal nerve will appear to be a branch of the vagus and pass lateral to the internal and external carotid arteries. Identify theĪccessory nerve emerging from the jugular foramen and passing lateral into the sternocleidomastoid. The muscle is described as having two main parts, thyropharyngeus and cricopharyngeus, which originate from the oblique line of the thyroid lamina and lateral aspect of the cricoid cartilage respectively. Microsurgical anatomy of the laryngeal nerves as related to thyroid surgery. The inferior pharyngeal constrictor muscle is one of the pharyngeal constrictor muscles. Internal jugular vein. (G 8.27 N 73 & 71 GI 44.30) Trace the internal carotid artery and internal jugular vein to the base of the skull. inferior pharyngeal constrictor muscle and the pharyngeal plexus. Inferior pharyngeal-constrictors. (G 8.27 N 67 GI 44.30) The superior constrictor is continuous with the buccinator, the middle constrictor is at the level of the hyoid bone, and the inferior constrictor is at the level of the larynx. 3, 5 The middle constrictor then inserts in the posterior midline to the pharyngeal raphe. Identify and clean (remove fascia and veins, but not arteries or nerves) the The middle pharyngeal constrictor muscle originates from greater and lesser horns of the hyoid bone and the stylohyoid ligament which runs from the styloid process in the skull base to the minor processes of the hyoid bone. You will return to these structures in Step 2 of the Deep Neck dissection. Before bisecting the head you will identify the pharyngeal constrictors and the cranial nerves emerging from the base of the skull near the jugular foramen.
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