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Coronal sections through the midbrain showing Fos-LI after saline (A, B) or muscimol (C, D) infusion into the AcbSh. Fos expression was increased by muscimol in both the VTA and medial substantia nigra, pars compacta. IP, Interpeduncular nucleus; SNR, substantia nigra, pars reticulata. Magnification: A, C, 40×;B, D, 100×.
