"The thyropharyngeus muscle arises from the (a) thyroid cartilage at the oblique line and (b) the tendinous arch that spans the cricothyroid muscle. Its fibres curve around posteriorly and insert into the midline raphe. The lower fibres are horizontal and lie edge to edge with those of the cricopharyngeus component."
"The cricopharyngeus muscle is rounder and thicker than the other constrictor muscles. Its fibres run continuously from one side of the cricoid arch to the other side around the pharynx without inserting into a midline raphe posteriorly. Its muscle fibres are continuous with the circular muscular coat of the oesophagus."
"The recurrent laryngeal nerve and inferior laryngeal vessels pass upwards deep to the lower border of the cricopharyngeus"
"The middle and superior constrictors are enclosed by the thyropharyngeus fibres that wrap around to the midline raphe"
Expected headings
"Relations and/or boundaries"
"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."
"nerve: pharyngeal plexus; cricopharyngeus part can also receive innervation from the recurrent laryngeal nerve and/or the external laryngeal nerve"