L18: Palate/Pharynx Flashcards
1
Q
What is the pharynx?
A
- Continuation of digestive tube below oral and nasal cavities
2
Q
3 parts of pharynx
A
- Nasopharynx: upper part (posterior to nose) - Oropharynx: middle part (posterior to mouth) - Laryngopharynx: inferior part (posterior to the larynx)
3
Q
Layers of the pharyngeal wall?
A
- Mucus membrane - Submucosa - Pharyngobasilar fascia - Skeletal muscle layer (constrictors) - Buccopharyngeal fascia
4
Q
What is the name of the potential space behind the pharynx? Boundary? Clinical significance?
A
- Retropharyngeal space located between buccopharyngeal fascia and prevertebral fascial (of deep cervical fascia)
5
Q
What structure does the buccopharyngeal fascia contain?
A
- Pharyngeal plexus
6
Q
Names of the pharyngeal muscles?
A
- Superior constrictor - Middle constrictor - Inferior constrictor - Stylopharyngeus
7
Q
Function of the pharyngeal muscles?
A
- Constrict wall of pharynx during swallowing
8
Q
What do the pharyngeal muscles all insert onto?
A
- Insert and blend with their fellow muscles onto pharyngeal raphae at the posterior midline
9
Q
Superior constrictor – O/I/I
A
- O: originates from pterygoid hamulus, pterygomandibular raphe and mandible - I: pharyngeal raphae, pharyngeal tubercle of occipital bone - I: pharyngeal plexus
10
Q
Middle constrictor – O/I/I
A
- O: hyoid bone - I: pharyngeal raphae - I: pharyngeal plexus
11
Q
Inferior constrictor – O/I/I
A
- O: thyroid cartilage - I: pharyngeal raphae and blends with esophagus inferiorly - I: pharyngeal plexus
12
Q
Stylopharyngeus – O/I/I
A
- O: styloid process - I: thyroid cartilage and pharyngeal raphae - I: innervated by CN IX
13
Q
What contributes to the pharyngeal plexus?
A
- CN IX - CN X - CN XI - Sympathetic nerves
14
Q
What provides sensory innervation to the pharynx?
A
- CN IX
