Pharynx - Inferior constrictor (dave's notes) Flashcards

1
Q

What are the parts of the inferior constrictor?

A

Thyropharyngeus and cricopharyngeus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where does thyropharyngeus arise?

A

From the oblique line of the thyroid cartilage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Where does cricopharyngeus arise and run to?

A

Runs uninterrupted from one side of the cricoid arch to the other with no raphe.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the action of cricopharyngeus? With what is it continuous?

A

Acts as a sphincter. Continuous with the oesophagus. Always closed except during swallowing.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Where may a pharyngeal diverticulum develop?

A

At the junction of cricopharyngeus and thyropharyngeus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Describe the course of palatopharyngeus

A

Palatopharyngeus fibres pass internal to the superior constrictor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Describe the course of salpingopharyngeus

A

Arises from the lower part of the auditory tube and blends with palatopharyngeus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Describe the origin and path of stylopharyngeus

A

Arises high up on the styloid process sloping down across the internal carotid artery

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the blood supply to the inferior constrictor?

A

Many different sources

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe the venous drainage of the inferior constrictor

A

By the pharyngeal plexus (at the back of the middle constrictor) draining to the pterygoid plexus or to the internal jugular vein

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Where does inferior constrictor lymph drain to?

A

Retropharyngeal nodes, to the upper and lower deep cervical nodes.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the nerve supply to the pharynx? What is the exception to this?

A

Via the pharyngeal plexus, except stylopharyngeus which is by theglossopharyngeal nerve, and criopharyngeus may be supplied by the recurrent laryngeal nerve.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where are the cell bodies to the six muscles found?

A

The nucleus ambiguous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where is the pharyngeal plexus found?

A

In the posterolateral wall of the pharynx (the middle constrictor).

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What nerves contribute to the pharyngeal plexus?

A

Formed by the vagus, glossopharyngeal, and cervical sympathetic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the nerve supply to the mucosa of the pharynx? (oropharynx, vallecula, remainder)

A

Most of the oropharynx is supplied by the glossopharyngeal nerve
The vallecula is supplied by the internal laryngeal nerve
The remainder is supplied by the internal and recurrent laryngeal nerve.