The Larynx: Functional Anatomy of Respiration and Phonation: Laryngeal Musculature and Innervation (AP) Flashcards
1
Q
Action of cricothyroid
A
- Pulls thyroid cartilage anteriorly and inferiorly
- Increases pitch of voice
2
Q
Innervation of cricothyroid
A
External branch of superior laryngeal nerve
3
Q
Action of posterior cricoarytenoid
A
- Abducts/laterally rotates arytenoid cartilage and vocal folds
- Opens rima glottidis
4
Q
Innervation of posterior cricoarytenoid
A
Recurrent laryngeal nerve
5
Q
Action of lateral cricoarytenoid
A
- Medial rotation of arytenoid cartilage
- Adducts vocal folds and narrows rima glottidis
6
Q
Innervation of lateral cricoarytenoid
A
Recurrent laryngeal nerve
7
Q
Action of transverse arytenoid
A
Adducts arytenoid cartilages
8
Q
Innervation of transverse arytenoid
A
Recurrent laryngeal nerve
9
Q
Action of oblique arytenoid
A
- Adduct arytenoids + vocal folds
- Narrows laryngeal inlet
- Acts as a sphincter
10
Q
Innervation of oblique arytenoid
A
Recurrent laryngeal nerve
11
Q
Action of thyroarytenoid
A
- Narrows laryngeal inlet and vestibule
- Pulls arytenoid cartilages anteriorly to relax vocal ligament
- Medially rotates arytenoid cartilages to close rima glottidis
12
Q
Innervation of thyroarytenoid
A
Recurrent laryngeal nerve
13
Q
Action of vocalis muscle
A
- Alters tension of vocal ligament
> Relaxes posterior part
> Maintains tension on anterior part
14
Q
Innervation of vocalis muscle
A
Recurrent laryngeal nerve
15
Q
Position of vocal cords during quiet respiration
A
Not majorly abducted or adducted
