Pharynx: muscles

Question 1

The muscles of the pharynx are divided into two layers. What are these layers?

Answer 1

1) External (circular) Layer

2) Longitudinal Layer

Question 2

What muscles are found within the External (circular) Layer?

Answer 2

1) Inferior Constrictor
2) Middle Constrictor
3) Superior Constrictor
4) Palatophayngeal Sphincter

Question 3

What is the common insertion for all of the constrictor muscles

Answer 3

Pharyngeal Raphe

Question 4

What is the common nerve innervation of the constrictor muscles?

Answer 4

Vagus nerve (CN X) via the pharyngeal plexus

Question 5

The Inferior constrictor muscle has one extra innervation than the other constrictors. What is that extra innervation?

Answer 5

External Laryngeal Nerve

Question 6

Which constrictor muscle has fibers that will interweave with the muscle fibers of the tongue?

Answer 6

Superior Constrictor

Question 7

What is the specialized band of muscle fibers formed by the superior constrictor to help seal the pharyngeal isthmus during swallowing?

Answer 7

Palatopharyngeal Sphincter

Question 8

What atre the muscles of the longitudinal layer of the pahyranx?

Answer 8

1) Stylopharyngeus
2) Palatopharyngeus
3) Salpingopharyngeus

Question 9

Which muscle of the longitudinal layer works with the tensor veli palatini to open the pharyngotympanic tube?

Answer 9

Salpingopharyngeus

Question 10

Which two muscle will have fibers that will blend within the fall of the pharynx?

Answer 10

1) Palatopharyngeus

2) Salpingopharyngeus