<unk> , is an uncommon-to-rare<unk>  disorder in infants, children and adults. One of the other names of the disorder, West syndrome, is named after the English physician, William James West (1793–1848), who first described it in an article published in The Lancet in 1841. The original case actually described his own son, James Edwin West (1840–1860). Other names for it are "generalized flexion epilepsy", "infantile<unk>  encephalopathy", "infantile myoclonic encephalopathy", "jackknife convulsions", "massive myoclonia" and "Salaam<unk> ". The term "infantile<unk> " can be used to describe the specific seizure manifestation in the syndrome, but is also used as a synonym for the syndrome itself. West syndrome in modern usage is the triad of infantile<unk> , a pathognomonic EEG pattern (called hypsarrhythmia), and developmental regression – although the international definition requires only two out of these three elements. The syndrome is age-related, generally occurring between the third and the twelfth month, generally manifesting around the fifth month. There are various causes. The syndrome is often caused by an organic brain dysfunction whose origins may be prenatal, perinatal (caused during birth) or postnatal.
Epileptic spasms
Gelastic seizure
Reflex seizure
Musicogenic seizure
Hair-grooming syncope
Benign neonatal sleep myoclonus
Reflex syncope
Absence seizure