• Postmortem samples of caudate nucleus and frontal cortex from schizophrenic, schizophrenic-like, and control subjects were examined for monoamine oxidase activity using dopamine, phenylethylamine, and 5-hydroxytryptamine as substrates. There were no significant differences between the diagnostic groups with any of the three substrates. Neither was there a difference between the sexes, nor a consistent relationship of enzyme activity to age.
Reveley MA, Glover V, Sandler M, Spokes EG. Brain Monoamine Oxidase Activity in Schizophrenics and Controls. Arch Gen Psychiatry. 1981;38(6):663-665. doi:10.1001/archpsyc.1981.01780310063006