Fig. 3.
Conditioning enhances CS-elicited complex EPSP amplitude. CS-elicited complex EPSP produced from a type Ieinterneuron from a conditioned animal (A) and a pseudorandom control (B). Thearrowhead beneath each recording indicates the onset and offset of the 10 sec CS. In these experiments the Ieinterneurons were briefly hyperpolarized to approximately −80 mV to block spike activity during the presentation of the CS. The initial component of the complex EPSP is shown on a faster time base inC and D. E, Group data depicting the mean (± SEM) peak amplitude of the complex EPSPs recorded from Ie interneurons in the conditioned group and pseudorandom controls. *p < 0.01.