The association between blood harmane concentration and brain NAA/tCR only occurred in the cerebellar cortex;it was not observed in secondary brain regions of interest.

• 血中哈尔碱浓度与小脑内N-乙酰天冬氨酸/总肌酸比值的相关性只出现在小脑皮质，而在其它兴趣脑区并不存在。