Here is an article where a re-evaluation of all extant literature is made. It confirms that acupuncture is not as ancient as generally been assumed, and that it did not, in fact, appear and gradually develop during China's Neolithic Age. Rather, it arose quite suddenly, and rapidly developes, approximately two millenia ago.
How old is acupuncture? Challenging the Neolithic Origins Theory. Bai Xinhua.
Journal of Chinese Medicine.
http://ezinearticles.com/?How-Old-is-Acupuncture?-Challenging-the-Neolithic-Origins-Theory&id=3067317
