Larynx Flashcards Preview

Anatomy Written 2 > Larynx > Flashcards

Flashcards in Larynx Deck (13):
1

Skeleton

Hyoid bone

2

Cartilages

Upaired (3)
Epiglottic
Thyroid
Cricoid (circular)
Paired (3)
Arytenoid
Corniculate
Cuneiform

3

Ligaments

Thyroid membrane
Cricothyroid Ligament
Vocal Ligament (true vocal folds)
Vestibular Ligament (false vocal folds)
Quadrangular Membrane

4

Subdivisions

Vestibule - area of larynx above vestibular fold
Ventricle - lateral extensions of larynx btw vocal and vestibular folds
Infraglottic cavity - area of larynx below vocal folds

5

Extrinsic Muscles

Suprahyoid and Infrahyoid

6

Intrinsic Muscles

Posterior Cricoarytenoid
Lateral Cricoarytenoid and Transverse Arytenoid
Cricothyroid
Thyroartenoid and vocalis

7

Posterior Cricoarytenoid - Action

Abducts (opens) vocal folds

8

Lateral Cricoarytenoid and Transverse Arytenoid - Action

Adducts (closes) the vocal folds

9

Cricothyroid - Action

Tenses (tightens) vocal folds

10

Thyroartenoid and vocalis

Relaxes the vocal folds

11

Vascular Supply

Superior and Inferior Laryngeal arteries off the Superior and Inferior Thyroid arteries

12

Nerve Supply - Sensory

Branches of Vagus -
1. Internal Laryngeal nerve (mucous membranes from superior surface of vocal folds and area above)
2. Recurrent Laryngeal nerve (mucous membranes from inferior surface of vocal folds and area below)

13

Nerve Supply - Motor

Branches of Vagus -
1. External Laryngeal nerve (cricothyroid only)
2. Recurrent Laryngeal nerve (all intrinsic muscles of larynx except cricothyroid)