LGI1 and viral encephalitis: Status dissociatus (breakdown of the boundaries of the different states of being, which are wakefulness, REM sleep, and non-REM sleep, with motor hyperactivity), and agrypnia excitata (insomnia, motor and autonomic hyperactivation) are a hallmark feature of Morvan syndrome (with CASPR2 antibodies, and less commonly, LGI1 antibodies), but can also be present in encephalitis with NMDAR antibodies or GABABR antibodies (Frisullo et al., 2007; Provini et al., 2011; Stamelou et al., 2012; Abgrall et al., 2015).