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A concussion occurs when the head sustains a hard blow and the
impact jars or shakes the brain inside the skull, interrupting the brain's
normal activities. Although there may be cuts or bruises on the head or face,
there may be no other visible signs of a brain injury.
a concussion can include any of the following changes in the person's level of
consciousness, such as:
Symptoms of a concussion can be mild to severe, depending
on the severity of the injury. If the injury is more serious, symptoms will
usually develop within the first 24 hours after the accident. Symptoms may last
for days, weeks, or even months following the injury.
Current as of:
February 20, 2015
Anne C. Poinier, MD - Internal Medicine & William H. Blahd, Jr., MD, FACEP - Emergency Medicine
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