A seizure occurs when there’s abnormal electrical activity in the brain. Seizures may go virtually unnoticed. Or, in severe cases, they may produce a change or loss of consciousness and involuntary muscle spasms called convulsions. Seizures usually come on suddenly and vary in duration and severity. A seizure may be a one-time event, or you may have seizures repeatedly. Recurrent seizures are called epilepsy, or a seizure disorder. Less than one in 10 people who has a seizure develops epilepsy.
Experts classify seizures into two general categories and many subtypes based on the pattern of the attack.
If you have been diagnosed with epilepsy, you will have many questions. One of the first will probably be, "How can my epilepsy be treated?" There is no single answer to this question. That is because doctors have identified hundreds of different epilepsy syndromes, which involve many different types of seizures.
Your epilepsy may be inherited, or it may not. One study has found that some people with epilepsy have inherited an abnormally active version of a gene that makes them resistant to drugs...
Generalized seizures involve both sides of the brain from the start of the attack. Common subtypes include tonic-clonic (grand mal) and absence seizures (petit mal). Febrile and infantile spasms are two types of generalized seizures that occur almost exclusively in young children.
Partial (or focal) seizures are the second major seizure type. These begin in a specific area of the brain and may be contained there. Or they may spread to the entire brain.
With simple partial seizures, the person remains conscious.