Difficulties in both initiating and maintaining sleep as well as reduced overall sleep duration have been reported in individuals with SYNGAP1 mutations.3,8,9 In our previous work we performed 6 hr recordings EEG recordings and found that Syngap+/Δ−GAP animals displayed absence seizures at a higher rate than controls.17 We have further analysed these recordings, which were made during daylight hours, resulting in rats spending approximately half of the recording time asleep. The gene discussed is SYNGAP1; the disease is Generalized non-motor (absence) seizure.