“…The small intestine displays frequencies that are much higher than the stomach, usually above 0.16 Hz (Christensen, Schedl, & Clifton, 1966;Riezzo et al, 2013;Waldhausen, Shaffrey, Skenderis, Jones, & Schirmer, 1990). The frequency range of the colon is broader, ranging from 2 to 12 cycles per minute in humans (Erickson et al, 2019;Homma et al, 1995;Pezzolla, Riezzo, Maselli, & Giorgio, 1989;Riezzo, Pezzolla, Maselli, & Giorgio, 1994;Taylor, Duthie, Smallwood, & Linkens, 1975), that is, potentially overlapping in frequency with the gastric rhythm (Amaris, Sanmiguel, Sadowski, Bowes, & Mintchev, 2002;Erickson et al, 2019). Still, numerous studies found that the 3 cpm rhythm disappeared, or was largely reduced, following surgical removal of the stomach but not of the colon (Homma et al, 1995;Imai & Sakita, 2005;Kaiho et al, 2000;Pezzolla et al, 1989).…”