|Epilepsy is a common chronic neurological disorder characterized by recurrent unprovoked seizures. About 50 million people worldwide have epilepsy, with almost 90% of these people being in developing countries. Epilepsy is more likely to occur in young children, or people over the age of 65 years, however it can occur at any age. |
Epilepsy is usually controlled, but usually cannot be cured with medication, although surgery may be considered in difficult cases. However, over 30% of people with epilepsy do not have seizure control even with the best available medications. Not all epilepsy treatments are lifelong – some forms are confined to particular stages of childhood.
Seizure types/ Types of Fits
Seizure/Fit types are organized firstly according to whether the source of the seizure within the brain is localized (partial or focal onset seizures) or distributed (generalized seizures). Partial seizures are further divided on the extent to which consciousness is affected. If it is unaffected, then it is a simple partial seizure; otherwise it is a complex partial (psychomotor) seizure. Generalized seizures are divided according to the effect on the body but all involve loss of consciousness. These include absence (petit mal), myoclonic, clonic, tonic, tonic-clonic (grand mal) and atonic seizures.
Conversion disorder can be distinguished from epilepsy because the episodes never occur during sleep and do not involve incontinence or self-injury.Epilepsy syndromes
There are over 40 different types of epilepsy, including: Absence seizures, atonic seizures, benign Rolandic epilepsy, childhood absence, clonic seizures, complex partial seizures, frontal lobe epilepsy, Febrile seizures, Infantile spasms, Juvenile Myoclonic Epilepsy, Juvenile Absence Epilepsy, Hot Water Epilepsy, lennox-gastaut syndrome, Landau-Kleffner Syndrome , myoclonic seizures, Mitochondrial Disorders, Progressive Myoclonic Epilepsies, Psychogenic Seizures , Reflex Epilepsy, Rasmussen''s Syndrome, Simple Partial seizures, Secondarily Generalized Seizures, Temporal Lobe Epilepsy, Tonic-clonic seizures, Tonic seizures, Psychomotor Seizures, Limbic Epilepsy, Partial-Onset Seizures, generalised-onset seizures, Status Epilepticus, Abdominal Epilepsy, Akinetic Seizures, Autonomic seizures, Massive Bilateral Myoclonus, Catamenial Epilepsy, Drop seizures, Emotional seizures, Focal seizures, Gelastic seizures, Jacksonian March, Lafora Disease, Motor seizures, Multifocal seizures, Neonatal seizures, Nocturnal seizures, Photosensitive seizure, Pseudo seizures, Sensory seizures, Subtle seizures, Sylvan Seizures, Withdrawal seizures, Visual Reflex Seizures amongst others.
Idiopathic epilepsies are generally thought to arise from genetic abnormalities that lead to alteration of basic neuronal regulation. Symptomatic epilepsies arise from the effects of an epileptic lesion, whether that lesion is focal, such as a tumor, or a defect in metabolism causing widespread injury to the brain. Cryptogenic epilepsies involve a presumptive lesion that is otherwise difficult or impossible to uncover during evaluation.
People who only have had a single seizure, or those with seizures that occur only after specific precipitants ("provoked seizures"), have "epilepsies" that fall into this category. Febrile convulsions are an example of seizures bound to a particular precipitant. Below are some common seizure syndromes: