[The mechanism of the origin of acute subdural hemorrhage]

Acute subdural haemorrhage was found in 220 persons, i. e. 30.1% of a group of 731 of those who died as a result of blunt impact head injuries. The result of an analysis confirmed the significant effect of the direction and site of the blow on the development of acute subdural bleeding. Subdural haemorrhage was found the most frequently in violent blows coming from the side on the temporal region [43.4%] and in blows coming from behind on the occipital region [40.5%]. Another point proved was that in blows dealt in these directions the highest incidence of subdural haemorrhage was due to significantly more frequent development of bleeding in the group of middle-aged persons over 50, and that at the site of contrecoup. Proceeding from the results of his analysis the author stresses the significance of brain contusion and laceration for the development of acute subdural haemorrhage.