Anatomy of phonation- section 3 extrinsic muscles PPT lecture 10/26 Flashcards
1
Q
What are elevators?
A
Extrinsic muscles elevate the hyoid and larynx
2
Q
What are depressors?
A
extrinsic muscles that depresses the hyoid and larynx
3
Q
The larynx rides firmly but freely with the what?
A
Neck
4
Q
True of false:
The larynx can be repositioned through muscular adjustments
A
True
5
Q
What muscles are important for the act of airway protection and swallowing?
A
Laryngeal elevators and depressors
6
Q
How many hyoid and laryngeal elevators are there?
A
7
7
Q
What are the 7 hyoid and laryngeal elevators?
A
- Diagastricus (anterior and posterior)
- stylohyoid
- mylohyoid
- geniohyoid
- genioglossus
- hyoglossus
- thyropharyngeus
8
Q
What is the Digastricus?
A
- It converges at hyoid bone and paired contraction elevates the hyoid
- active during swallowing
9
Q
What is the stylohyoid?
A
- elevates and retracts the hyoid bone
10
Q
What is the Mylohyoid?
A
- fanlike in appearance
- fibers form the floor of the oral cavity
- elevates hyoid and projects it forward
- elevates the floor of the mouth during deglutition
11
Q
What is the Geniohyoid?
A
- elevates the hyoid and draws it forward
12
Q
What is hyoglossus?
A
- elevates the hyoid bone and works with genioglossus as a tongue ‘depressor’
13
Q
What is the genioglossus?
A
- a muscle of the tongue that also assists in elevating the hyoid bone
14
Q
What is the thyropharyngeus?
A
- elevates the larynx while constricting the pharynx
15
Q
What are the 4 hyoid and laryngeal depressors?
A
- Sternohyoid
- Omohyoid
- Sternothyroid
- Thyrohyoid
