This is a prospective study of epilepsy biomarkers in a total of 100 subjects of ages 4-18. Participants will spend about 5 hours at the Massachusetts General Hospital (MGH) Athinoula A. Martinos Center for Biomedical Imaging. They will undergo training on a memory task concurrent with EEG/MEG recordings. During the EEG, subjects will wear headphones that will deliver a quiet pink noise stimulus intermittently during a nap, or a sham. The auditory stimulus will be calibrated in volume to not cause arousals. After napping, subjects will undergo cognitive testing and memory task testing.
