Dopamine Function is Deficient in Major
Depression
Parkinson’s Disease associated with depression.
CSF shows low homovanillic acid (HVA).
Neuroendocrine challenges: blunted responses to dopamine
agonists
Depletion of dopamine with AMPT causes depression in
recovered patients but not normals.
Imaging: nothing found yet.
Postmortem brain: no data
Genes: TH, COMT & MAO