Great strides have been made in the study of the mechanism and management of injuries of the head during the past ten years. In the present paper it is proposed that the more important of these studies be analyzed.
MECHANISM OF CRANIOCEREBRAL TRAUMA
Injury to the head may occur by direct or indirect violence. In a direct blow the head is relatively fixed and the striking object is in motion. A direct blow may cause compression of the intracranial contents by deformation of the skull, and it may set the head to motion (acceleration). In indirect blows the head in motion comes in contact with a nonmoving or slower moving object. Under these circumstances, compression and deceleration may obtain. Compression, deceleration and acceleration frequently coexist in the usual injuries such as auto accidents, falls, etc.1 With direct blows the lesion is more likely to be limited to the head,