An<unk>  (EMS) or esophageal manometry is a test to assess motor function of the upper esophageal sphincter (UES), esophageal body and lower esophageal sphincter (LES).
Esophageal motility study
Esophageal pH monitoring
Nasoendoscopy
Gonioscopy
Sialoendoscopy
Photoglottography
Transnasal esophagoscopy
Impedance–pH monitoring