Phosphorylation of mitogen-activated protein kinase in the medial prefrontal cortex and the amygdala following memory retrieval or forgetting in developing rats

► We examine MAPK activation in the brain of rats that remember or forget fear. ► Remembering was associated with significant phosphorylation of MAPK in the mPFC. ► There was MAPK activation in the amygdala even after forgetting.