Related Experiment Video
Updated: Jul 18, 2026

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
Published on: November 25, 2017
Head torsion technique for detailed observation of larynx and hypopharynx
A Tsunoda1, A Ishihara, S Kishimoto
1Department of Otolaryngology, Tokyo Medical and Dental University, Tokyo, Japan. atsunoda@mac.com
Abstract:
We introduce here an easy but effective method for detailed observation of the larynx and hypopharynx. During the endoscopic observation, the patient's head is turned to one side. Anatomical structures on the same side of the endolarynx, such as the laryngeal ventricle and inferior surface of the vocal fold, are easily observed. In addition, observation of the opposite side of the hypopharynx also becomes easier. Such head turning is also useful in patients with an oblique larynx, in whom the epiglottis obstructs insertion of the endoscope. This is a simple but very effective technique for laryngeal and hypopharyngeal observation.
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