Fig. 1.
Small variability of depressed EPSPs and large facilitation by 5HT. Records of successive groups of monosynaptic potentials from a sensorimotor pair in culture (A) and plot of the whole experiment (B). C, Magnified view of EPSPs 4–15 showing the small variation in amplitude. Stimulation was interrupted for 5 min after EPSP 15, and two more EPSPs (data not shown) were elicited before addition of 5HT. The interstimulus interval was 30 sec. Calibration bars: A, 2 mV, 10 msec; C, 1 mV, 10 msec.