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Epileptic spasms, infantile spasms, juvenile spasms, West syndrome or West's syndrome is an uncommon-to-rare epileptic disorder in infants, children and adults. It 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).〔http://www.whonamedit.com/synd.cfm/3217.html〕 Other names for it are "Generalized Flexion Epilepsy", "Infantile Epileptic Encephalopathy", "Infantile Myoclonic Encephalopathy", "jackknife convulsions", "Massive Myoclonia" and "Salaam spasms". The term "infantile spasms" 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 spasms, a pathognomonic EEG pattern (called hypsarrhythmia), and developmental regression〔(【引用サイトリンク】title=NINDS Infantile Spasms Information Page )〕 - 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 ("polyetiology"). The syndrome is often caused by an organic brain dysfunction whose origins may be prenatal, perinatal (caused during birth) or postnatal. ==Signs and symptoms== The epileptic seizures which can be observed in infants with West syndrome fall into three categories, collectively known as infantile spasms. Typically, the following triad of attack types appears; while the three types usually appear simultaneously, they also can occur independently of each other: * ''Lightning attacks'': Sudden, severe myoclonic convulsions of the entire body or several parts of the body in split seconds, and the legs in particular are bent (flexor muscle convulsions here are generally more severe than extensor ones). *''Nodding attacks'': Convulsions of the throat and neck flexor muscles, during which the chin is fitfully jerked towards the breast or the head is drawn inward. *''Salaam or jackknife attacks'': a flexor spasm with rapid bending of the head and torso forward and simultaneous raising and bending of the arms while partially drawing the hands together in front of the chest and/or flailing. If one imagined this act in slow motion, it would appear similar to the oriental ceremonial greeting (Salaam), from which this type of attack derives its name. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Epileptic spasms」の詳細全文を読む スポンサード リンク
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