Pharyngeal constrictor muscles

The pharyngeal constrictor muscles are three muscles in the throat that constrict the pharynx in a rhythmic manner to assist in swallowing. This action is known as peristalsis.

The three pharyngeal constrictor muscles are in descending order:
 * Superior pharyngeal constrictor muscle
 * Middle pharyngeal constrictor muscle
 * Inferior pharyngeal constrictor muscle