Figure 4 - Manometric example of pharyngeal muscle weakness.
From the following article
Oral, pharyngeal and upper esophageal sphincter motility disorders
Benson T. Massey and Reza Shaker
GI Motility online (2006)
doi:10.1038/gimo19
This manometric study shows a dry swallow a patient with oculopharyngeal muscular dystrophy who has cervical dysphagia for solids. Note the low amplitudes of the pharyngeal pressure waves. The UES basal pressure is not reduced, and the peristaltic wave in the proximal esophagus is normal.
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