Abbreviations
From the following article
Clinical disorders of the upper esophageal sphincter
Ian J. Cook
GI Motility online (2006)
doi:10.1038/gimo37
ALS
amyotrophic lateral sclerosis
CP
cricopharyngeal
EMG
electromyography
GABA-B
-aminobutyric acid
GERD
gastroesophageal reflux disease
LES
lower esophageal sphincter
UES
upper esophageal sphincter