The translational acceleration theory hypothesized that intracranial damage is mainly caused by injurious pressure gradients developed in the brain due to brain motion and skull deformation [6,7]. Studies included the use of embalmed cadavers and anesthetized animals. Focal injuries such as cerebral contusions and intracerebral hematomas are considered to be the consequence of translation of the head in the horizontal plane . Concussion can be produced in experimental monkeys solely by translational acceleration from a direct impact while no correlation exists between the occurrence of concussion and rotational acceleration .
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