anatomy of larynx and speech

Question 1

what does contraction of posterior cricoarytenoid cause

Answer 1

lateral rotation at cricoarytenoid joint which widnes rima glottidis

Question 2

what provides the protective function of the larynx

Answer 2

• glottic closure

- cough reflex

Question 3

how does phonation work

Answer 3

once subglottal pressure threshold is reached then air crosses vocal cords causing vibration

Question 4

what happens when the vocal cords adduct

Answer 4

quieter

Question 5

what happens when the vocal cords abduct

Answer 5

louder

Question 6

what are the intrinsic muscles of the larynx innervated by

Answer 6

inferior laryngeal branch of CN X

Question 7

what do the thyroarytenoid muscles

Answer 7

• relax vocal ligament

- decreasing pitch

Question 8

what do the cricothyroid muscles do

Answer 8

• tenses vocal ligament
• increasing pitch
• nods thyroid cartilage

Question 9

what is the mucosa above the vocal folds supplied by

Answer 9

the internal laryngeal nerve

Question 10

what is the mucosa below the vocal folds supplied by

Answer 10

inferior laryngeal nerve

Question 11

how do supra-glottic tumours spread

Answer 11

drain to superior deep cervical lymph nodes

Question 12

where do sub-glottic tumours spread to

Answer 12

paratracheal nodes