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. 2012 Oct 31;8:52. doi: 10.1186/1744-9081-8-52

Figure 1.

Figure 1

Classical fear conditioning results. Comparison of the magnitudes (mean ± SEM) of the bradycardic responses in the habituation sessions, the first ten trials of the acquisition sessions (Acquisition 1), the last ten trials of the acquisition sessions (Acquisition 2), the first five trials of the extinction sessions (Extinction 1), and the last ten trials of the extinction sessions (Extinction 2). * denote significant differences relative to the habituation levels (Steel test, p < 0.05).