Many Things Happenin
There are so many things happening during acupuncture
it may never be totally understood.
The body views the needle as a foreign invader, and rushes natural pain killers, macrophages etc. to the site. Nerves perceive the insertion, sending a signal to the brain, which may change muscle tone locally. A Japanese MD, Nakatani, discovered the meridians can be mapped through electrodermal skin testing.