GRIN2A and developmental and/or epileptic encephalopathy with spike-wave activation in sleep: Mutations and deletions in the GRIN2A gene predispose to several childhood-onset epilepsy syndromes within the epilepsy-aphasia spectrum, including Landau-Kleffner syndrome (LKS), epileptic encephalopathy with continuous spike-and-wave during sleep (ECSWS), childhood epilepsy with centrotemporal spikes (CECTS), atypical childhood epilepsy with centrotemporal spikes (ACECTS), autosomal dominant rolandic epilepsy with speech dyspraxia (ADRESD), and infantile-onset epileptic encephalopathy [96], [97], [98], [99], [100].