Contrast of the variations from striatum metabolites in different groups in mice.

aMetabolites: (*) represents a material which has not been identified.bLoading: (+) represents a somewhat increase of the metabolite in the right group of the subtitle (e.g.: 20 mg/kg cocaine group of control vs. 20 mg/kg cocaine); (++) represents a significant increase of the metabolite in the right group of the subtitle; (−) represents a decrease of the metabolite in the right group of the subtitle; (–) represents a significant decrease of the metabolite in the right group of the subtitle; (/) represents no variations of the metabolite between the left group of the subtitle and the right group of the subtitle.