atonic seizure

The common phenotypes are FS and FS+. The unfrequent phenotypes include FS+ with absence seizure, FS+ with myoclonic seizure,FS+ with atonic seizure,and even severer syndromes such as myoclonic-astasic epilepsy and severe myoclonic epilepsy in infancy.
它具有显著的表型异质性，常见表型是典型的热性惊厥(FS)和热性惊厥附加症(FS+)；少见的表型包括FS+伴失神发作、FS+伴肌阵挛性发作、FS+伴失张力发作以及更为严重的综合征如肌阵挛站立不能型癫癎，婴儿严重肌阵挛性癫癎(severe myoclonic epilepsy in infancy，SMEI)。