concussion

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concussion

a jarring of the brain, caused by a blow or a fall, usually resulting in loss of consciousness

concussion

[kən′kəsh·ən]
(engineering)
Shock waves in the air caused by an explosion underground or at the surface or by a heavy blow directly to the ground surface during excavation, quarrying, or blasting operations.
(medicine)
A state of shock following traumatic injury, especially cerebral trauma, in which there is temporary functional impairment without physical evidence of damage to impaired tissues.
References in periodicals archive ?
Second impact syndrome. Clin Sports Med 1998; 17(1):37-44.
The true incidence of second impact syndrome is unknown.
The failure to sub Keegan left him vulnerable to the potentially deadly 'second impact syndrome'.
The reason for exercising caution is a condition called "second impact syndrome." This is occurs when the symptoms of the first concussion haven't totally cleared and a second concussion occurs.
This is largely on the basis that the committee concluded that there is no conclusive test with regard to concussion, given that it is an evolving injury, and sending a player back into action would leave him vulnerable to the potentially fatal second impact syndrome.
The 14-year-old died in 2013 due to second impact syndrome, which occurs when a blow causes swelling to the brain before it has recovered fully from an earlier injury.
The coroner ruled Ben died as a result of second impact syndrome - which happens when a blow causes swelling to the brain before it has recovered fully from an earlier injury.
A spokesman for Acquired Brain Injury Ireland has revealed that, if he was concussed as Harte stated, then Cavanagh put himself in danger of a potentially fatal second impact syndrome.
LESSONS will be learned after a teenage rugby player became the first person here to die from second impact syndrome, the Education Minister said yesterdaty.
A SCHOOLBOY rugby player has become the first person in Northern Ireland to die from second impact syndrome, a coroner ruled yesterday.