It is a truth of biology that if it can go right it can
go wrong.
Billions of things go right in your body at every instant of
your life. It is not surprising, given the enormous number of functions at the
molecular, cellular, tissue and organ levels needed to sustain life, that
things go wrong sometimes. The severity of that “wrong” depends on how much it
deviates from normal and how foundational
the affected function is. The loss of nerve cells in the substantia nigra in
Parkinson’s disease is a very severe loss of function. This has a very
significant impact because the substantia nigra is foundational for the
initiation of conscious movement, which is crucial to navigate our physical
environment and the society we live in.
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