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. Author manuscript; available in PMC: 2010 Jan 12.
Published in final edited form as: Brain Res. 2008 Oct 30;1248:162–175. doi: 10.1016/j.brainres.2008.10.040

Figure 1.

Figure 1

Illustration of stimuli used in the interstimulus interval (ISI) discrimination procedure. All CSs preceded, overlapped, and coterminated with a 100 ms shock US. The CS durations were 380 ms (short CS) and 980 ms (long CS) with ISIs between CS and US onset of 280 and 880 ms, respectively. Adaptive CRs were recorded from the last 200 ms of the CS period prior to US onset. The short and long CSs were of different sensory modalities (one CS was a tone, the other CS was a light; reprinted from Brown et al., 2008).