![]() 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). There are two muscular layers of the pharynx: the outer circular layer and the inner longitudinal layer.ĭuring swallowing, these muscles constrict to propel a bolus downwards (an involuntary process).ĭuring swallowing, these muscles act to shorten and widen the pharynx. The muscle extends inferiorly, traveling along the sides of the pharynx between the superior and middle pharyngeal constrictor. 21 compared the EMG data of the CPM with the simultaneous EMG findings of the ipsilateral pharyngeal and laryngeal muscles at a neurology clinic in 2006. It originates from the medial base of the styloid process of temporal bone. The authors observed innervation of the inferior pharyngeal constrictor muscle by both the RLN and PP in all patients. The pharyngeal muscles (involuntary skeletal) push food into the esophagus. Stylopharyngeus muscle is a long, thin muscle that is shaped like a cylinder superiorly and becomes flat inferiorly. The pharyngeal raphe is a raphe that serves as the origin and insertion for several of the pharyngeal constrictors (thyropharyngeal part of the inferior pharyngeal constrictor muscle, middle pharyngeal constrictor muscle, superior pharyngeal constrictor muscle). ![]() What is the inferior pharyngeal constrictor muscle innervated by Pharyngeal nerve-branch of the vagus (CN10) The cricopharyngeus muscle is also innervated by the external branch of the superior laryngeal nerve and recurrent laryngeal nerve. The pharyngeal muscles are a group of muscles that form the pharynx, which is posterior to the oral cavity, determining the shape of its lumen, and affecting its sound properties as the primary resonating cavity. Insertion of the superior pharyngeal constrictor. ![]()
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