two hours later , compared with those of saline controls brain levels of the norepinephrine metabolite 3-methoxy-4-hydroxyphenylethylethyleneglycol ( mhpg ) sulfate were significantly higher in the hypothalamus ( wky ) , locus coeruleus ( sd and shr ) and brain stem ( shr ) in tyrosine-treated animals , and in the locus coeruleus ( sd ) of those given aspartame .
C0006121
brain stem
C0023951
locus coeruleus