Neuro 24 View Larger Version of this Image] Figure three. Learning occluded the PKA mediated AHP reduction. Examples of μM isoproterenol’s impact on a CA neuron from a naïve A and a hint EBC B rat are illustrated. Note that isoproterenol decreased the postburst AHP without abolishing it in the CA neuron from the naïve animal A while isoproterenol had minimal effect on the CA neuron from a educated rat B.