I think to answer those questions you'd need a researcher or expert ....
example:
http://blogs.scientificamerican.com/...on-and-stress/
We have a link at the top right of the page to PubMed. using a good keyword will bring up many many research papers. Some of them have the contact information(emails) to the individuals who are actually doing the research, and those are the folks best qualified to answer some of these more detailed questions.
The research into neuroplasticity is ongoing...and revealing new insights every day.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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