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Associative specificity of ERK/MAPK activation in the LA. A, Mean ± SE pMAPK-immunoreactive cells in the LA after paired (Paired; n = 5) or unpaired (Unpaired; n = 5) presentations of tone and shock. Rats were perfused 60 min later. *p < 0.05 relative to the unpaired group.B, Representative photomicrograph of pMAPK labeling in the amygdala after paired stimulation. C, Representative photomicrograph of pMAPK labeling in the amygdala after unpaired stimulation.
