PHARYNGEAL, UPPER ESOPHAGEAL SPHINCTERIC AND ESOPHAGEAL PRESSURES RESPONSES RELATED TO VOCAL TASKS AT THE LIGHT OF HIGH RESOLUTION MANOMETRY.

HRM is a valuable tool for measuring pharyngoesophageal pressures during phonation. Esophageal pressures are higher during phonation than at rest and tend to increase with vocal loudness increment. The topographic plot provides additional data about phonatory mechanism physiology, especially at the UES region.