1.   These patterns of contractile activity occur in all healthy subjects and are normally recorded with tube mounted pressure sensors.

2.   The amplitude, wave duration, motility index, wave frequency, and wave velocity were analysed in the upright and supine positions and during prandial and postprandial periods.

3.   The highest wave frequency and motility index were noted in the postprandial period.

4.   Blue is the last color wave frequency that our eyes distinguish before the cones give up.