Effects of METH and WIN-51,708 (WIN) on TH immunoreactivity in the striatum. Administration of 10 mg/kg METH resulted in a decrease in the intensity of TH immunoreactivity in four out of five animals 3 days after treatment. Pretreatment with 10 mg/kg WIN-51,708 prevented the METH-induced depletion of TH staining. Note that METH induces greater deficits of TH in the lCPu relative to the mCPu. Scale bar, 100 μm. CPu, caudate-putamen; lCPu and mCPu refer to lateral and medial aspects of the caudate-putamen, respectively; Cx, cortex.