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. Author manuscript; available in PMC: 2009 Jul 20.
Published in final edited form as: Neuroimage. 2007 Dec 8;40(2):811–817. doi: 10.1016/j.neuroimage.2007.11.042

Figure 2.

Figure 2

SCR time course from CS100 (dashed line) and CS50+ (solid line) trials for a representative subject. SCRs were larger to CS100 than to CS50+ trials showing the typical learning-related change observed in the conditioned response during most fear conditioning studies. In addition, a learning-related change in the UCR can also be observed with a smaller SCR following the UCS on CS100 than on CS50+ trials. This reduction in the unconditioned SCR on CS100 relative to CS50+ trials is known as UCR diminution.