, Volume 33, Issue 2, pp 163-178

The balance of biogenic amines as condition for normal behaviour

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An accumulation of norepinephrin, serotonin and dopamin exists in the brainstem. A decrease of biogenic amines in the brains of Parkinson's cases has been demonstrated. A substitution by the precursor L-DOPA produces an increase of dopamin in the brain and a decrease of serotonin. The high level of dopamin improves the akinesia and the depletion of serotonin causes a toxic delir. A substitution by l-tryptophan restores the balance and the Dopa-psychosis disappears.