Response: Video‐EEG Recordings in Idiopathic Generalized Epilepsy, including Juvenile Myoclonic Epilepsy

To the Editor: We regret that we missed the article by Casaubon et al. (1). They described three patients with idiopathic generalized epilepsy (IGE), including juvenile myoclonic epilepsy (JME), with video-EEG documentation. In all six recorded generalized tonic–clonic seizures, lateralized clinical features were present. Ictal EEG figures from their article show the generalized onset but do not illustrate the subsequent asymmetrical evolution in the hemisphere contralateral to the side of version, as pointed out by us. This asymmetry explains the focal features; however, the generalized ictal onset is critical to making a correct diagnosis of a generalized epilepsy. They suggested a focal frontal cortical generator in some patients with IGE. Although the pathophysiology of IGE is still unresolved, their experience agrees with our observations of a larger group of 26 patients with JME.