“…All we can say to-day is that on the basis of histological studies there are those who think the neurological complications of diabetes are usually determined by arterial disease (Woltman and Wilder, 1929) or even by a specific diabetic angiopathy (Sullivan, 1958;Fagerberg, 1959), and those who advance cogent arguments against such theories (Rundles, 1945;Martin, 1953a;Bischoff, 1959). There is therefore no agreement as to whether the important factor is metabolic or ischmmic, nor do we know the anatomical level of the early lesions, and for this reason anatomical terms are better withheld from diagnostic labels.…”