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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Juvenile myoclonic epilepsy ： ウィキペディア英語版 Juvenile myoclonic epilepsy Juvenile myoclonic epilepsy (JME), also known as Janz syndrome, is a fairly common form of idiopathic generalized epilepsy, representing 5-10% of all epilepsy cases. This disorder typically first manifests itself between the ages of 12 and 18 with brief episodes of involuntary muscle twitching occurring early in the morning. Most patients also have generalized seizures that affect the entire brain and many also have absence seizures. Genetic studies have demonstrated at least 6 loci for JME, 4 with known causative genes. Most of these genes are ion channels with the one non-ion channel gene having been shown to affect ion channel currents. ==Signs and symptoms== Signs of JME are brief episodes of involuntary muscle twitching occurring early in the morning or shortly before falling asleep. This does not usually result in the person falling, but rather dropping objects. These muscle twitching episodes are more common in the arms than in the legs. Other seizure types such as generalized tonic-clonic and absence seizures can also occur. Patients often report quick jerking movements in the morning that results in knocking over objects such as their morning orange juice. Clusters of myoclonic seizures can lead to absence seizures, and clusters of absence seizures can lead to generalized tonic-clonic seizures. The onset of symptoms is generally around age 10-16 although some patients can present in their 20s or even early 30s. The myoclonic jerks generally precede the generalized tonic-clonic seizures by several months. Some people with the disorder never get generalized tonic-clonic seizures (GTCs). Sleep deprivation is a major factor in triggering GTCs. College students often present with a GTC after "pulling an all-nighter." Patients with JME generally do not have other neurological problems. 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「Juvenile myoclonic epilepsy」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.