Epilepsy is a brain disorder characterized by recurrent seizures -- episodes of abnormal electrical activity in almost any part of the brain. The symptoms of a seizure can mimic any form of human behavior, depending on which part of the brain is affected. Generally, the term epilepsy (or seizure disorder) refers to relatively stereotyped attacks of involuntary behavior. The exact symptoms and severity may vary, and the seizures may occur infrequently or in rapid succession.
While every case of epilepsy...
A seizure occurs when a burst of electrical impulses in the brain escape their normal limits. They spread to neighboring areas and create an uncontrolled storm of electrical activity. The electrical impulses can be transmitted to the muscles, causing twitches or convulsions.
Causes of Epilepsy
There are around 180,000 new cases of epilepsy each year. About 30% occur in children. Children and elderly adults are the ones most often affected.
There is a clear cause for epilepsy in only a minority of the cases. Typically, the known causes of seizure involve some injury to the brain. Some of the main causes of epilepsy include:
low oxygen during birth
head injuries that occur during birth or from accidents during youth or adulthood
genetic conditions that result in brain injury, such as tuberous sclerosis
abnormal levels of substances such as sodium or blood sugar
In up to 70% of all case of epilepsy in adults and children, no cause can ever be discovered.
Causes of Seizures
Although the underlying causes of epilepsy are usually not known, certain factors are known to provoke seizures in people with epilepsy. Avoiding these triggers can help you avoid seizures and live better with epilepsy: