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Ron Vetter wrote: > I remember several instances: childhood nightmares, typhoid fever when 11, > post-divorce depression, deep depression after only daughter (only child of > 2nd marriage) was killed by being hit by an automobile in 1978. My > diagnosis was obtained in 1984. It is absolutely normal to be depressed when one experiences the life-altering events you have mentioned. There are many, many people who have lived through even more traumatic incidences without developing PD, however. Too much Dopamine has been identified as the possible cause of some psychosis, specifically schizophrenia. It should not be surprising that too little Dopamine can cause depression. Infact, perhaps we have a chicken-egg dilemma here - what comes first? Do low levels of Dopamine cause depression prior to PD symptoms, or does depression cause low levels of Dopamine. I'm voting for the former. ------ Regards Mary Ann