Fig. 5.

Impact of fear conditioning on the responses of CeL neurons to electrical stimuli delivered in LA. A: after habituation (Hab) to the tone conditioned stimulus (CS), 3 groups of rats were either subjected to fear conditioning (FC) or presented with the same number of shocks (Shock) or tones (Tone). Graph plots % time freezing in the 3 groups. A recall test (Test, right) was performed the next day. These animals were not used for the physiological experiments but were treated exactly as the experimental subjects (see materials and methods). B and C: amplitude (y-axis) of LA-evoked EPSPs (positive values) or IPSPs (negative values) as a function of stimulation intensity (x-axis) in RS (B) or LTB (C) neurons.