[Diaschisis phenomenon in different neurological diseases]. 
Diaschisis is based on reversible depression of functions anatomically or functionally connected to the damaged area.  It was described for the first time in 1914 by von Monakow.  There has been a rise in the studies on diaschisis over the past twenty years--what is closely related to the progress made in functional neuroimagining techniques.  In this article we try to describe the diaschisis phenomenon, its types, the possibilities of its investigations and clinical implications.