ziggystarlust
Jedi
An interesting 2011 study from Harvard/Massacheucetts General. They MRI'd people before and after an eight week meditation program. Hippocampus grew, while the Amygdalae shrunk a bit. Why the latter point, I am not sure-but it is heartening to know that it may be possible to grow some new grey matter, as I have probably destroyed a few along the course of my life.
http://www.naturalnews.com/048499_meditation_brain_cells_stress.html
http://www.naturalnews.com/048499_meditation_brain_cells_stress.html