Video S1. The first phase III in Case A. The bowel motions consisted of a row of equally-spaced, wave-like configurations with rhythmic contractions, migrated rightward at a rate of 25.6 cm min-1 and a frequency of 11 cpm.

Video S2. The putative phase IV in Case A. This phase is characterized by the presence of sporadic contractions and asynchronous waves that followed immediately after phase III.

Video S3. The clustered MWs in Case B were moving steadily rightward at a rate of 22 cm min-1 and a frequency of 11 cpm.

Video S4. The MWs in Case C moved smoothly leftward at a rate of 25.3 cm min-1 and a frequency of 9.7 cycles per minute. Moderate amount of ascites was noted.

Video S5. In Case C, about 8 minutes after a test meal, inflow of chyme distending the lumen sequentially toward the left was observed, which coincided with the direction of the pre-existing MWs. Note that, The MWs turned adynamic (serpent-like) long before the chyme arrived, i.e. the abolishment of the MWs is not caused by mechanical distension but rather something happened earlier. This feature agrees with the neurohumoral nature of phase III.

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