Validation of the Normalized Laryngeal Constriction Ratio in Normal and Disordered Swallowing.

Purpose: The timing of laryngeal vestibule closure (LVC) is important for airway protection during swallowing. However, it is unknown whether the extent of LVC contributes to airway protection. The goal of this study is to validate the extent of LVC via a measure called laryngeal constriction ratio (LCR).