Different distributions of interstitial cells of Cajal and platelet-derived growth factor receptor-α positive cells in colonic smooth muscle cell/interstitial cell of Cajal/platelet-derived growth factor receptor-α positive cell syncytium in mice

Figure 6 Membrane potentials evoked by electrical field stimulation in normal colonic proximal and distal muscles. A: Electrical field stimulation (EFS) from the proximal colon at different frequencies (50 V; 3, 6, and 9 Hz for 5 s; black bars in each panel) elicited biphasic hyperpolarization comprising a peak component followed by sustained hyperpolarization. B: EFS from the proximal colon at different frequencies (50 V; 3, 6, and 9 Hz for 5 s; black bars in each panel). C and D: Summary of data showing the average amplitude of fast inhibitory junction potentials and slow inhibitory junction potentials at both ends of the colon (n = 8; ^aP < 0.05). fIJP: Fast inhibitory junction potential; sIJP: Slow inhibitory junction potential.