Published online by Cambridge University Press: 28 April 2020
The neuropathological changes associated with head injuries are dependent on a number of factors, including both the type and severity of the injury, and the former can be divided into non-missile and missile types of injury. Non-missile injury (or blunt head injury) is usually due to rapid acceleration or deceleration of the head, with or without impact, or less commonly crushing of the head, and most often occur as the result of road traffic accidents or falls. Missile injuries are due to penetration of the skull by a rapidly moving external object, for example gunshot wounds, and result in a different pattern of brain injury. The neuropathology can be separated into focal (or localised) lesions such as contusions, haemorrhages, skull fractures, or diffuse changes such as diffuse axonal injury, diffuse vascular injury, brain swelling and ischaemia (see Table 2.1).
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