Most researchers believe that Olde Robert Selfe was the ancestor of most of the Self family in America. Arriving in Virginia in the 1600s, Robert Selfe appears to have been descended from Walter Selfe of Cripplegate, London, England. The name Self is thought to be a shortened version of Seawolf, dating back to the early Viking voyages along the English coast.
A stress reaction is the lowest grade of the three levels of bone injury. A stress reaction is essentially the early stages of a stress fracture. This occurs when the stresses affecting the bone occur at a faster rate than the rate at which the bone is able to rebuild itself.
1 Definition of stress - A stress is defined as a force per unit area, acting on an infinitesimal surface element. 2  Stresses have both magnitude (force per unit area) and direction, and the direction is relative to the surface on which the stress acts.  There are normal stresses and tangential stresses.