Hi,
Actually 'you' do hear about it, depending on what news your following. In the last decade or so this guy Alan Schore has been researching away and found that the relationship between the primary care giver and the small child affects how the brain develops, which in turn I think effects the neuro chemicals.
The thing is though, pds have an emotional cause rather than a biochemical cause, so they are availabe for healing in relationship, as it is in relationship that they originate.

I'd be interested to know about your interest. Why does this subject draw you?

riverx