Larynx: Muscles Flashcards
1
Q
Muscles
A
- Muscles close inlet
- Muscles stretch vocal cords
- Muscles relax vocal cords
- Muscles adduct vocal cords
- Muscles abduct cords
2
Q
Muscles close inlet
A
- Transverse arytenoid
- Oblique arytenoids
- Aryepiglottic
3
Q
Transverse arytenoid
A
- Single muscle
- Covers posterior surfaces of both arytenoids
- Extends between their lateral margins
4
Q
Oblique arytenoids
A
- 2 muscles
- Cross each other like letter X
- Lie in superificial to transverse arytenoid
- Extends from posterior surface of muscular process one arytenoid to other arytenoid apex
5
Q
Aryepiglottic
A
- Prolongation of oblique arytenoid into aryepiglottic fold
- Arises from arytenoid apex and inserts into epiglottis side
6
Q
Muscles stretch vocal cord
A
- Cricothyroid
- Vocalis (anterior part)
7
Q
Cricothyroid
A
From anterolateral aspect of cricoid arch to thyroid cartilage lower border and inferior horn
8
Q
Vocalis (anterior part)
A
- Lateral to vocal cord and
- Stretches anterior part
9
Q
Muscles relax vocal cord
A
- Thyroarytenoid
- Vocalis posterior part
10
Q
Thyroarytenoid
A
From lower 1/2 of inner surface thyroid cartilage angle to arytenoid anterolateral surface
11
Q
Vocalis posterior part
A
Relaxed cord posterior part
12
Q
Muscles adduct vocal cords
A
- Lateral cricoarytenoid
- Transverse arytenoid
- Cricothyroid
13
Q
Lateral cricoarytenoid
A
From superior surface of cricoid arch to anterior surface of arytenoid muscular process
14
Q
Muscles abduct cords
A
Posterior cricoarytenoid
15
Q
Posterior cricoarytenoid
A
From posterior surface cricoid lamina to posterior surface of arytenoid muscular process
