Activation of the medial prefrontal cortex by escapable stress is necessary for protection against subsequent inescapable stress-induced potentiation of morphine conditioned place preference.
Rozeske RR, Der-Avakian A, Watkins LR, Maier SF. Activation of the medial prefrontal cortex by escapable stress is necessary for protection against subsequent inescapable stress-induced potentiation of morphine conditioned place preference. Eur J Neurosci. 2012 Jan; 35(1):160-5.