Doctors generally classify seizures as either focal or generalized, based on the abnormal brain activity.
Seizures that appear to result from abnormal activity in just one area of your brain are called focal (partial) seizures. Symptoms of focal seizures may be confused with other neurological disorders, such as migraine, narcolepsy or mental illness. A thorough examination and testing are needed to distinguish epilepsy from other disorders.
Types of focal seizures include:
Seizures that appear to involve all areas of the brain are called generalized seizures, including:
Lennox-Gastaut syndrome (LGS) is a severe type of epilepsy with multiple types of seizures. It accounts for approximately 2 to 5% of all cases of childhood epilepsy. LGS seizures can be difficult to control and require lifelong treatment. Learning problems often, but not always, result from LGS. Children with LGS may develop normally before the onset of LGS but then lose their previously acquired skills, such as sitting, crawling or walking.