What are the constrictor muscles?
The muscle is a quadrilateral muscle, thinner and paler than the inferior pharyngeal constrictor muscle and middle pharyngeal constrictor muscle….
| Superior pharyngeal constrictor muscle | |
|---|---|
| Nerve | Pharyngeal plexus of vagus nerve |
| Actions | Swallowing |
| Identifiers | |
| Latin | Musculus constrictor pharyngis superior |
What is the function of the constrictor muscles?
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 are the three pharyngeal constrictor muscles?
These muscles are known as the stylopharyngeus, the palatopharyngeus and the salpingopharyngeus. There are several gaps that exist between the folds of the pharyngeal constrictor muscles which allow structures to enter and exit the pharynx.
What is the role of the constrictor muscles of the pharynx?
By sequential contraction, the pharyngeal constrictor muscles create a peristaltic wave that facilitates passage of the food bolus inferiorly, from the pharynx towards the esophagus, during the act of deglutition.
What are the inferior constrictor muscles?
The inferior pharyngeal constrictor muscle is one of the pharyngeal constrictor muscles. 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.
Which of the following muscles assist in the swallowing process?
[17] The longitudinal pharyngeal muscles function to condense and expand the pharynx as well as help elevate the pharynx and larynx during swallowing. These muscles include the stylopharyngeus (CN IX), salpingopharyngeus (CN X), and the palatopharyngeus (CN X).
Where does the inferior constrictor muscle originate?
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.