The following are video excerpts of William Seifriz, Professor of Botany, University of Pennsylvania.
* Reproduced with permission (complete video recording available at www.booksandbones.com).

Dr Seifriz demonstrates a fluid fluctuation (or streaming) within protoplasm - which remains a mystery and of unknown origin. These are the same fluctuations (50 seconds and additional faster rates) of rhythmic movement also felt within the human body during Osteopathic treatment. The presence of Health is the most fundamental principle within Osteopathy, and it is perceived as movement within the tissues of a person's body. These videos clearly demonstrate the expression of Health as movement, in it's most primative form. The potential for (and presence of) disease within the body is characterised by the absence of such movement. The objective of Biodynamic Cranial Osteopathy is to find this Health (expressing itself as a Movement within Life), and to help it spread throughout the entire body. This then becomes a source of the body's own self healing capacity.