The objective was to define EEG sleep patterns of children with Dup15q syndrome.
Alpha–delta sleep occurred in 14 children (33%, nine with idic15).
Electrical status epilepticus in sleep found in 15 children (35%, all with idic15)
High amplitude, sharp fast activity found in 15 children (35%, 14 with idic15)
This is the first report of sleep EEG patterns in children with Dup15q syndrome.