Fig. 3.

Effect of slow ramp distension of the esophagus on esophageal responses. These are TH, CP, esophagus 2 cm from the CP (E2), E4, and E6 EMG recordings during EUCR or EPSR in response to a slow ramp distension of the esophagus at the cervical (5 cm from the CP) and proximal thoracic (11 cm from CP) regions of the esophagus. Note that the EPSR occurred either during the slow distension (threshold at 34 mmHg) or at the end of the slow distension. These distensions activated the EUCR before the EPSR.