Distension-related responses in circular and longitudinal muscle of the human esophagus: an ultrasonographic study.

Both circular muscles (CM) and longitudinal muscles (LM) of the esophagus participate in peristalsis. Various measurement techniques have yielded conflicting information as to the temporal correlation between contraction in the two muscle layers. High-frequency intraluminal ultrasound (HFIUS) is a novel technique to detect contraction of LM and CM of the… CONTINUE READING