Traumatic brain injuries (TBI) are the sudden lethal injuries to the brain that occur when the brain hits a hard object.
One of the most common causes of disability and death in adults is, the traumatic brain injury, of which, the young men makeup a large proportion. The physiological changes resulting from the injury depends upon the type and severity of the injury. However, the injuries produced may be even missed by imaging techniques.
Thus, the blank can be filled with Traumatic brain injury.