facial/oral lec 4 Flashcards
1
Q
functions of jaw muscles? (2)
A
- speech
- mastication
2
Q
categories of jaw muscles? (2)
A
- opening
- closing
3
Q
what are the jaw muscles innervated by?
A
- all by trigeminal nerve
- except geniohyoid (C1)
4
Q
study table 12.2
A
5
Q
what are the 3 jaw closing (elevating) muscles?
A
- masseter
- temporalis
- medial pterygoid
6
Q
which is stronger: opening or closing muscles?
A
closing
7
Q
what are the 4 jaw opening (depressing) muscles?
A
- lateral pterygoid
- digastric (anterior belly)
- mylohyoid
- geniohyoid
8
Q
what does it mean if someone’s jaw has too much excursion? what about to little excursion?
A
- too much excursion: too big/open
- too little excursion: too small/closed
9
Q
study table 12.6
A
10
Q
what are the 3 constrictors of the pharynx?
A
- superior pharyngeal constrictor
- middle pharyngeal constrictor
- inferior pharyngeal constrictor
11
Q
where is the pterygomandibular raphe?
A
vertical ligament along back of jaw behind molars
12
Q
what is passavant’s pad?
A
- pad of muscle that helps close/seal the velopharyngeal port at the posterior
- part of superior pharyngeal constrictor
13
Q
what is the median pharyngeal raphe? where is it? what is its purpose?
A
- midline of pharyngeal aponeurosis
- posterior wall of pharynx
- purpose: where right and left palatal muscles fuse
14
Q
what are the 2 parts of the inferior pharyngeal constrictor?
A
- thyropharyngeus (upper)
- cricopharyngeus (lower)
15
Q
Which pharyngeal muscle houses the upper gastro-esophageal sphincter?
A
Cricopharyngeus (IPC)
