a significant increase in ar activity in old rats was found in striatum ( 12 % ) , cerebellum ( 26 % ) , midbrain ( 6 % ) , brainstem ( 19 % ) and hypothalamus ( 13 % ) with p-nitrobenzaldehyde , in striatum ( 14 % ) , midbrain ( 10 % ) , brainstem ( 52 % ) , hypothalamus ( 9 % ) and hippocampus ( 20 % ) with d-glucuronate , in cerebellum ( 21 % ) with d-xylose , in striatum ( 43 % ) , cerebellum ( 19 % ) and brainstem ( 22 % ) with dl-glyceraldehyde , and in brainstem ( 15 % ) with pyridine 3-aldehyde .
C0025462
midbrain
C0006121
brainstem