ATP1A3 and alternating hemiplegia of childhood: Similarly, knock-in of one of the AHC mutations, D801N (Atp1a3+/D801N; Mashl+/−; MGI 6162645), recapitulated many of the clinical features of AHC, including hemiplegia, dystonia, tremor, and seizures, as well as deficits in memory, gait, and motor coordination and control (Hunanyan et al., 2015).