Fig. 9. Effects of JSTX (5x10^–6 mol l^–1) on EJPs in myocardial cells. The EJPs were evoked by stimuli applied to the cardiac ganglion trunk at 1 Hz. The EJPs in normal saline (control) were blocked at 30 min after the onset of JSTX application (5x10^–6 mol l^–1 JSTX). The EJPs partially recovered at 120 min after washing out of JSTX (wash). The numbers on the left side of the traces show the membrane potentials of the cardiac muscle at the beginning of the recordings.