When blood and lymphatics flow freely, the tissues can perform their physiologic functions without impedance. With the occurrence of trauma (physical or emotional), the tissues contract, twist, and compress. The fluid flow becomes obstructed. Micro-climates of underperfusion result, and are considered to be a significant contributor to the onset of disease. Osteopathic manipulation restores freedom in the tissues, normalizes fluid flow and thus inherent physiologic function (healing) follows. Dr. A.