In direct laryngoscopy which of the following cannot be visualized:
Cricothyroid
Lingual surface of epiglottis
Arytenoids
Pyriform fossa
(a) Cricothyroid(Ref. Dhingra, 6th ed., 422)In Direct laryngoscopy we are visualising the cavity of the larynx from within so cricothyroid muscle or membrane which lie externally cannot be seen.
Anatomy of Larynx