What is a concussion?
Concussion the period of unconsciousness due to an impact or blow on the head.
The human brain is a complex gray matter of soft material and has billions of cells with fibers interconnected with blood vessels. The cerebrospinal fluids in the skull cushion the brain and absorb any vibrant shocks. When the skull experiences a violent jerk or blow, it shakes the inner tissues in the brain causing a disturbance in the electrical activity inside the nerve cells leading to a breakdown in the flow of message signals within the brain. This results in a sudden loss of consciousness which may last for a few seconds, hours or maybe days depending on the severity of the injury.
In case of minor or simple blow, the brain experiences minor bleeding and injury to the small blood vessels. The blood is absorbed back into the bloodstream without lasting damage. If the blow was strong, the bleeding within causes blood to accumulate and the blood slowly starts compressing the brain where the blood that leaked out would need to be removed by surgery.
A loss of consciousness and the period of regaining consciousness vary in different cases depending upon the nature of the blow to the skull or head. A drop in blood pressure has is also common. Recovery is always progressive and some memory loss may occur regarding the events immediately preceding the blow to the head.
An injury or blow to the head is the usual cause of a concussion.
The reported after effects may include drowsiness, headache, giddiness, nausea, numbness and/or weakness in the leg, insomnia, periodic fainting. Periodic fainting may be a sign of a serious condition. It may require immediate medical attention possibly leading to surgery to stop the brain from swelling and compressing itself inside the skull due to heavy bleeding and blood clots.