Video 6 - Normal subject.
From the following article
W.G. Paterson, Raj K. Goyal and Fortunée Irene Habib
GI Motility online (2006)
doi:10.1038/gimo20
In normal subjects, swallowing is associated with opening of the upper and the lower esophageal sphincter and sequential peristaltic wave that pushes the tail of barium ahead of it. Normal esophageal clearing time is around 13 seconds.
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