What does the superior pharyngeal constrictor attach to?
The present study found that the superior pharyngeal constrictor muscle is attached to the buccinator muscle (which plays an important role in mastication) with mucosa and originates from the mandible and root of the tongue.
What are the superior pharyngeal constrictors?
The superior pharyngeal constrictor muscle is a muscle in the pharynx. It is the highest located muscle of the three pharyngeal constrictors. The muscle is a quadrilateral muscle, thinner and paler than the inferior pharyngeal constrictor muscle and middle pharyngeal constrictor muscle.
What passes above superior constrictor?
Between the superior constrictor muscle and the skull , the levator palatini muscle, the auditory tube and the ascending palatine artery pass through. Between the superior and middle pharyngeal constrictor muscles, the stylopharyngeus muscle and the glossopharyngeal nerve pass through.
What passes between superior and middle constrictors?
The posterior border of this confluence is the glossopharyngeal gap, where the styloglossus and stylohyoid muscles pass between the superior and middle pharyngeal constrictor muscles, as they extend from the styloid process in the lateral pharyngeal space to the tongue and hyoid bone.
What is constrictor muscle?
The superior constrictor muscle originates from the pterygoid process, posterior end of the mylohyoid line of mandible, and the pterygomandibular ligament/raphe. This superior constrictor muscle inserts into the base of the skull at the pharyngeal tubercle and the pharyngeal raphe.
What do the superior constrictor muscles do?
The superior pharyngeal constrictor muscle is one of the pharyngeal constrictor muscles. Its primary action is constriction of the pharynx (in coordination with the middle pharyngeal constrictor and the inferior pharyngeal constrictor muscles) to deliver a bolus of food into the esophagus.
What Innervates the inferior constrictor?
Similarly to the superior and middle pharyngeal constrictor muscles, it is innervated by the vagus nerve (cranial nerve X), specifically, by branches from the pharyngeal plexus and by neuronal branches from the recurrent laryngeal nerve.
What are the 3 origin points for the superior pharyngeal constrictor?
The four parts are;
- Pterygopharyngeal part – originates from the pterygoid hamulus of sphenoid bone;
- Buccopharyngeal part – originates from the pterygomandibular raphe of buccopharyngeal fascia;
- Mylopharyngeal part – originates from the mylohyoid line of the mandible;
- Glossopharyngeal part – originates from the tongue.
What is Killian dehiscence?
The Killian dehiscence is a triangular-shaped area of weakness in the muscular wall of the pharynx, between the transverse and oblique bundles of the inferior pharyngeal constrictor 1. It is the most common site of pharyngeal diverticula 5.
Are pharyngeal constrictors voluntary?
The pharyngeal muscles (involuntary skeletal) push food into the esophagus. There are two muscular layers of the pharynx: the outer circular layer and the inner longitudinal layer. The outer circular layer includes: Inferior constrictor muscle.
What do pharyngeal constrictors do?
The posterior wall of the airway is largely comprised of the pharyngeal constrictor muscles which wrap around the airway and so also contribute to the lateral walls. As the name suggests, activation of these muscles constricts the airway, which assists in swallowing.
What Innervates the superior pharyngeal constrictor?
Innervation. Superior pharyngeal constrictor receives innervation from the pharyngeal branch of vagus nerve, via the pharyngeal plexus.