In no field of medicine do there exist more sharply opposed views than those expressed by various investigators on the subject of trauma to the brain and its membranes. The variation in teaching by men of equally large experience is hopelessly confusing to the large number of practitioners who are faced with the problems of head injury. The dissemination of opinion concerning the treatment of cranial injuries is important because the automobile has increased enormously the number of such patients for physicians in out of the way places where the services of a neurosurgeon are not readily available.
The development of the modern treatment of trauma to the brain has been influenced particularly by the work of Kocher1 and Cushing,2 by Weed and his collaborators3 and as a result of the extensive experience which came out of the World War. Kocher and Cushing described the four classic