we studied 99 hospitalized depressed , 14 manic , and 61 healthy control subjects and evaluated relationships during a drug-free baseline period between behavioral measures ( postulated to be associated with brain norepinephrine , dopamine , and serotonin function ) and metabolites of these neurotransmitters sampled from lumbar cerebrospinal fluid ( csf ) : 3-methoxy-4-hydroxyphenylglycol ( mhpg ) , homovanillic acid , and 5-hydroxyindoleacetic acid .
C0004927
behavioral
C0006104
brain