Observations on the electromyogram of the oesophagus at rest and during valsalva's manoeuvre

A. Arlazoroff*, Y. Rapoport, E. Shanon, M. Streifler

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


A method of recording the oesophageal electromyogram (EMG) with the aid of contact electrodes, attached to the surface of a balloon, is described. Recordings were made in 9 human subjects at three standard distances from the upper incisors, at rest and during Valsalva's manoeuvre, achieved by a standard effort. High grade EMG activity was recorded at rest from the upper oesophageal segment in all subjects and was found to be increased by Valsalva's manoeuvre. Similarities were found in the electrophysiological behaviour of the low pharyngeal and the high oesophageal muscles. From the lowermost recording position only scant EMG activity could be recorded. Specific aspects are discussed, concerning the recording and evaluation of the EMG of the oesophagus, an organ which is composed of both striated and smooth involuntary muscle.

Original languageEnglish
Pages (from-to)110-112
Number of pages3
JournalElectroencephalography and Clinical Neurophysiology
Issue number1
StatePublished - Jul 1972


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