A condition of lowered functional activity, without visible structural change, produced in an organ by a shock, as by fall or blow; as, a concussion of the brain
Jarring injury of the brain resulting in dysfuntion It can be graded as mild, moderate or severe depending on loss of consciousness, amnesia and loss of equilibrium
If you suffer concussion after a blow to your head, you lose consciousness or feel sick or confused. Nicky was rushed to hospital with concussion She fell off a horse and suffered a concussion. Period of nervous-function impairment that results from relatively mild brain injury, often with no bleeding in the cerebral cortex. It causes brief unconsciousness, followed by mental confusion and physical difficulties. These effects usually clear up within hours, but in some cases disturbance of consciousness continues, and there may be residual symptoms. Some level of amnesia often accompanies concussion. Recovery from concussion is almost always complete unless more serious injury, such as skull fracture, accompanies it
The common result of a blow to the head or sudden deceleration usually causing an altered mental state, either temporary or prolonged Physiologic and/or anatomic disruption of connections between some nerve cells in the brain may occur Often used by the public to refer to a brief loss of consciousness
Jarring injury of the brain resulting in dysfunction It can be graded as mild, moderate or severe depending on loss of consciousness, amnesia and loss of equilibrium