The inferior constrictor is innervated by the vagus nerve (all pharyngeal muscles except the stylopharyngeus are innervated by the vagus nerve; the stylopharyngeus is innervated by the glossopharyngeal). It is motor fibers because these muscles are involuntary skeletal muscles.
This individual has Zenker Diverticulum, which leads to an outpouching between the thyropharyngeus and cricopharyngeus and presents with the symptoms described (dysphagia, halitosis, FA2020 p384).
submitted by โcassdawg(1780)
The inferior constrictor is innervated by the vagus nerve (all pharyngeal muscles except the stylopharyngeus are innervated by the vagus nerve; the stylopharyngeus is innervated by the glossopharyngeal). It is motor fibers because these muscles are involuntary skeletal muscles.
This individual has Zenker Diverticulum, which leads to an outpouching between the thyropharyngeus and cricopharyngeus and presents with the symptoms described (dysphagia, halitosis, FA2020 p384).
Here is a 2.5 minute video on the pharyngeal constrictors and innervation if you are a more visual learner.
Here is an image of the pharynx and innervation.