"We found that the babies who died of SIDS had abnormalities in serotonin in regions of the brain stem that control breathing and heart rate and blood pressure during sleep."
VOA: standard.2010.02.08
Scientists are discovering a different kind of answer which has to do with the types ofabnormalities in the brain and body that are characteristic of people with depression.
Even more intriguingly, nerve cells in the colons of Parkinson's sufferers who are constipated contain structural abnormalities known as Lewy bodies, which are a hallmark of the affected brain tissue in people with Parkinson's.
Research in autism has indicated abnormalities in spinal fluid and chemical signaling in the brain- anecdotal reports of children undergoing stem cell therapy have indicated some potentially encouraging results.