Pharyngeal Muscles Flashcards
What are the Pharyngeal Muscles?
Superior Constrictor, Middle Constrictor, Inferior Constrictor, Stylopharyngeus
What is the origin of the Superior Constrictor muscle?
pterygoid hamulus, pterygomandibular raphe, and mandible
What is the origin insertion of the Superior Constrictor muscle?
pharyngeal tubercle of occipital bone
What is the innervation of the Superior Constrictor muscle?
Vagus (CN X) via Pharyngeal plexus
What is the blood supply of the Superior Constrictor muscle?
ascending pharyngeal artery
What is the action of the Superior Constrictor muscle?
constricts pharyngeal cavity
What is noteworthy about the Superior Constrictor muscle?
largest of constrictor muscles
What is the origin of the Middle Constrictor muscle?
hyoid bone
What is the insertion of the Middle Constrictor muscle?
middle pharyngeal raphe
What is the innervation of the Middle Constrictor muscle?
Vagus (CN X) via pharyngeal plexus
What is the blood supply of the Middle Constrictor muscle?
ascending pharyngeal artery
What is the action of the Middle Constrictor muscle?
constricts pharyngeal cavity
What is noteworthy about the Middle Constrictor muscle?
most intermediate in position and depth
What is the origin of the Inferior Constrictor muscle?
thyroid cartilage
What is the insertion of the Inferior Constrictor muscle?
middle pharyngeal raphe
What is the innervation of the Inferior Constrictor muscle?
vagus nerve (CN X) via pharyngeal plexus
What is the blood supply of the Inferior Constrictor muscle?
ascending pharyngeal artery
What is the action of the Inferior Constrictor muscle?
constricts pharyngeal cavity
What is noteworthy about the Inferior Constrictor muscle?
most external of constrictor muscles
What is the origin of the Stylopharyngeus muscle?
distal styloid process, stylohyoid ligament
What is the insertion of the Stylopharyngeus muscle?
passes between superior and middle constrictors and inserts on thyroid cartilage
What is the innervation of the Stylopharyngeus muscle?
CN IX glossopharyngeal nerve
What is the blood supply of the Stylopharyngeus muscle?
ascending pharyngeal artery
What is the action of the Stylopharyngeus muscle?
elevates larynx
What is noteworthy about the Stylopharyngeus muscle?
derivative of third pharyngeal arch, only muscle innervated by IX