For pressure waves of sufficient magnitude, the ballistic pressure wave theory predicts brain injury from well centered bullet hits to the chest. Critics of the theory pointed out that this prediction had not been confirmed in humans. Recent human autopsy results have demonstrated brain hemorrhaging from fatal hits to the chest, including cases with handgun bullets. (Krajsa, J., Příčiny, Causes of pericapillar brain haemorrhages accompanying a gunshot wounds, Institute of Forensic Medicine, Faculty of Medicine, Masaryk University, Brno, Czech Republic, 2009.) Thirty-three cases of fatal penetrating chest wounds by a single bullet were selected from a much larger set by excluding all other traumatic factors, including past history.
In such meticulously selected cases brain tissue was examined histologically; samples were taken from brain hemispheres, basal ganglia, the pons, the oblongate and from the cerebellum. Cufflike pattern haemorrhages around small brain vessels were found in all specimens. These haemorrhages are caused by sudden changes of the intravascular blood pressure as a result of a compression of intrathoracic great vessels by a shock wave caused by a penetrating bullet. (Krajsa, J., Příčiny, Causes of pericapillar brain haemorrhages accompanying a gunshot wounds, Institute of Forensic Medicine, Faculty of Medicine, Masaryk University, Brno, Czech Republic, 2009.)
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