Fig. 3.

Summary of the effect of pharyngeal stimulus on UES, esophageal, and LES pressure. These data were obtained from 16 subjects and show the individual data obtained in each subject and the mean values for each parameter. Note the increase in UES pressure, increase in UES length, and descent of the UES. Also note the change in esophageal length during pharyngeal stimulation. There was significant relaxation of the LES but no change in the craniocaudal location of the LES during pharyngeal stimulation.