![]() ![]() Pharyngeal weakness is seen across many common conditions: Parkinson’s disease 2, brainstem stroke 3, anterior cervical spine surgery 4, head and neck cancer5, myotonic muscular dystrophy6 and Zenker’s diverticulum 7. 1 As a pharyngeal constrictor muscle, it assists in the swallowing of food (bolus), conveying it downward into the esophagus. Jacqui Allen Pharyngeal Constriction Poor pharyngeal constriction is one of the most common swallowing deficits reported in swallowing clinics 1. Its function is to pull the pharyngeal wall forward and to constrict the pharyngeal diameter. It is innervated by the IX accessory nerve and X vagus via the pharengeal plexus. Innervated: Cranial Nerve X: Vagus Nerve. 2 It is inserted into the median raphe of pharyngeal aponeurosis. Function: pharynx descends, and the constrictors contract upon the bolus. the pterygopharyngeal part, the buccopharyngeal part, the myolopharyngeal part, and the glossopharyngeal part. The superior pharyngeal constrictor is composed of four parts according to origin (pterygomandibular raphe), i.e. It is located above the other two pharyngeal constrictors, forming a tube beginning at the pterygomandibular raphe. Morphoanatomically, the superior pharyngeal constrictor is relatively thin and pale. The other pharyngeal constrictors are the middle pharyngeal constrictor and the inferior pharyngeal constrictor. The superior pharyngeal constrictor is one of the three constrictor muscles of the pharynx. ( anatomy) The quadrilateral muscle in the pharynx, located superior to other pharyngeal constrictor muscles, arises from the pterygomandibular raphe, and inserts into the median raphe
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