Concussion is a fairly common brain injury caused by an impact to the head or upper body. A concussion interferes with brain function. In most cases the effects are mild and temporary, and the concussion does not cause permanent injury. But a concussion is a serious injury that can cause lasting brain damage or death if not treated properly.
Concussion occurs when the head or upper body is struck or shaken violently and the brain is rocked back and forth within its cushion of cerebrospinal fluid, striking the hard inside of the skull. During a concussion, the brain’s protective tissue can also be crushed or torn, resulting in a hemorrhage that can press harmfully against the brain.
Symptoms can vary from a temporary loss of consciousness to headache, confusion and fatigue. A concussion can also cause dizziness, nausea and ringing in the ears. Other symptoms may be delayed and can include memory lapse, sleep disorders, mood shifts and sensitivity to light or noise. These symptoms may be long-lasting.
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