Larynx

Question 1

Divisions?

Answer 1

• Supraglottis: From superior tip of epiglottis to ventricular fold
• Glottis: From true VC to horizontal plane 5mm below
• Sub glottis : from horizontal plane to inferior border of cricoid

Question 2

Functions

Answer 2

• Speech
• Respiration
• Swallowing

Question 3

Innervation

Answer 3

Motor: CN IX
-Supplies all muscles except the cricothyroid muscle
-This is supplied by the external laryngeal nerve
Sensory:
-Supraglottic: internal laryngeal nerve
-Subglottic and glottic: recurrent laryngeal nerve

Question 4

Muscles

Answer 4

Intrinsic: control vocal folds
Extrinsic: control everything else

Question 5

Cartilages

Answer 5

7 folds

• Thyroid cartilage
• Cricoid cartilage
• epiglottis
• Artynoid cartilages (corniculate and cuneiform)