![]() What Innervates pharyngeal constrictor muscles? ![]() The superior pharyngeal constrictor muscle is innervated by the pharyngeal branch of the vagus nerve via the pharyngeal plexus. Read More: What is the sugar backbone of DNA? What Innervates superior pharyngeal constrictor? It elevates the pharynx in order to close off the nasopharynx during swallowing. Palatopharyngeus muscle This muscle starts at the posterior border of the hard palate on the palatine aponeurosis and finishes on the posterior aspect of the lamina of the thyroid cartilage of the larynx, as do the other paired muscles. lateral border of the tongue (see Figure 2).the medial alveolar edge of the mandible above the mylohyoid line, and.inferior margin of the medial pterygoid plate,.What are the 3 origin points for the superior pharyngeal constrictor? It is one of three pharyngeal constrictors. The middle pharyngeal constrictor is a fan-shaped muscle located in the neck. 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 What is the superior constrictor muscle is suspended from? 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. The inferior pharyngeal constrictor muscle is one of the pharyngeal constrictor muscles. They are innervated by the pharyngeal branch of the Vagus nerve (CN X) with the exception of the stylopharyngeus muscle which is innervated by the glossopharyngeal nerve (CN IX). What muscles dilate pharynx?ĭuring swallowing, these muscles act to shorten and widen the pharynx. Its primary action is constricting of the pharynx (in coordination with the superior pharyngeal constrictor and the inferior pharyngeal constrictor muscles) to deliver a bolus of food into the esophagus. 1 The cricopharyngeus, in turn, which lies on top (at the orifice) of the esophagus, relaxes fully for the easy passage of bolus from the pharynx to the esophagus.The middle pharyngeal constrictor muscle is one of the pharyngeal constrictor muscles. The thyropharyngeus propels the food through the pharynx. As the thyropharyngeus contracts the cricopharygeus relaxes, and vice versa. Since the thyropharyngeus is attached to the cricoid and thyroid, it “provides an opportunity for laryngeal elevation.” 1īoth the thyropharyngeus and the cricopharyngeus participate in the proper swallowing of food (bolus) down to the esophagus. Whereas the cricopharyngeus arises from the cricoid cartilage, the thyropharyngeus starts from the thyroid cartilage (particularly from the thyroid lamina and inferior cornu) and inserts into the posterior pharyngeal raphe 1, thus, the name. The thyropharyngeus is the muscle superior to the cricopharyngeus. The inferior pharyngeal constrictor consists of two muscles: the thyropharyngeus and the cricopharyngeus. ( anatomy) The superior muscle arising from the thyroid cartilage, and, together with cricopharyngeus, constitute the inferior pharyngeal constrictor
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