33. Nerve Supply of the Pharynx

Question 1

Identify 1 - 3

Answer 1

1. Glossopharyngeal n.
2. Internal and external laryngeal nn.
3. Recurrent laryngeal n.

Question 2

Identify 4

Answer 2

4. Pharyngeal plexus

Question 3

The pharyngeal plexus of nerves is composed of 3 parts. What are they?

Answer 3

• Pharyngeal branch of the glossopharyngeal n.
• Pharyngeal branch of the vagus n.
• Cranial part of the spinal accessory n.

Question 4

____ is the major sensory component of the pharyngeal plexus.

Answer 4

The pharyngeal branch of the glossopharyngeal n.

Question 5

The pharyngeal branch of the glossopharyngeal n. is the major sensory component of the pharyngeal plexus.

→ Their sensory branches perforate the pharyngeal musculature to supply ____

Answer 5

the mucous membranes (mainly in the oropharynx region)

Question 6

Most of the motor innervation from the pharyngeal plexus is from ___ and _____

Answer 6

the pharyngeal branch of the vagus and the cranial part of the spinal accessory n.

Question 7

the pharyngeal branch of the vagus and the cranial part of the spinal accessory n.

→ It supplies 5 muscles → What are they?

Answer 7

the superior constrictor, middle constrictor, inferior constrictor, palatopharyngeus, and salpingopharyngeus mm.

Question 8

The recurrent laryngeal n. helps innervate ____ (which part of pharynx?)

Answer 8

the inferior portion of the inferior constrictor of pharynx

Question 9

The glossopharyngeal n. innervates ____

Answer 9

the stylopharyngeus m.