on behalf of all authors , the corresponding author states that there is no conflict of interest .
the forced migration process  of german - speaking  neurologists and psychiatrists under the nazis during the  1930s and 40s is  often preoccupied solely with   successful  concepts and therapeutic approaches . 
 the  case of german - canadian neurologist karl stern ( 19061975 )  is very instructive , however , since the process of forced migration , for him , proved to be a transitionary process from his former cutting edge work in neuropathology and holist neurology in germany to clinical psychiatry and the development of the new discipline of geriatric medicine in canada .