![]() The laryngeal ventricle also demarcates the separation between the quadrangular membrane superiorly, and the cricovocal. The upper esophageal sphincter ( UES) closure muscles include the cervical esophagus, cricopharyngeus, and inferior pharyngeal constrictor, but primarily the cricopharyngeus. Description: The Inferior constrictor (Constrictor pharyngis inferior) the thickest of the three constrictors, arises from the sides of the cricoid and thyroid cartilage. The vocal folds are commonly referred to as the vocal cords and the vestibular folds as the false vocal cords. Nerve: External laryngeal branch of thevagus. Conclusions: IMRT dose to the inferior constrictor correlated with persistent dysphagia requiring prolonged PEG use. The laryngeal ventricle is the fossa or sinus that lies between the vocal and vestibular folds on either side. V 40 to the inferior constrictor also correlated with PEG >12 months (p = 0.02) with a mean V 40 of 48% versus 41% for PEG ⩽12 months. Swallowing is an important part of eating and drinking. Mean dose (of individual mean doses) was 47 Gy for prolonged PEG use versus 41 Gy for PEG ⩽12 months. Swallowing, sometimes called deglutition in scientific contexts, is the process in the human or animal body that allows for a substance to pass from the mouth, to the pharynx, and into the esophagus, while shutting the epiglottis. Only IMRT dose to the inferior constrictor was significantly associated with length of PEG. Mean and median time for PEG was 7.7 and 4.4 months respectively (range 1.4–43.8). ![]() Results: Approximately 62% of patients required PEG, the majority placed during treatment. Analysis of IMRT dose was retrospectively performed for critical swallowing structures. The inner longitudinal layer includes: Stylopharyngeus muscle Salpingopharyngeus muscle Palatopharyngeus muscle During swallowing, these muscles act to shorten and widen the pharynx. Late dysphagia was assessed by length of PEG requirement. Inferior constrictor muscle swallowing, these muscles constrict to propel a bolus downwards (an involuntary process). ![]() Methods and materials: A retrospective study was performed on 141 consecutive patients with LAHNC (squamous cell) treated with definitive chemoIMRT with weekly concurrent carboplatin and paclitaxel. These parts (and their attachments) include the: thyropharyngeal part (thyroid cartilage of. Background and purpose: To determine if dose and/or dose-volume parameters to anatomic swallowing structures are predictive of gastrostomy tube (PEG) dependence from chemotherapy-intensity modulated radiotherapy (IMRT) in locally advanced head and neck cancer (LAHNC). Note: The inferior pharyngeal constrictor m. ![]()
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