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Sleep disorder

From SNPedia

Several sleep disorders and related circadian rhythm sleep disorders (CRSDs) are influenced by genetic predispositions and are defined by persistent or recurrent disturbed sleep–wake cycles. There several types, including:

Delayed sleep phase type (DSPT): characterized by significantly delayed sleep timing

Advanced sleep phase type (ASPT): characterized by extremely early involuntary sleep timing

Free-running type (FRT): characterized by sleep timing that occurs with a 30-min to 1-h delay each day.

Normal sleep duration or day/night preferences may be influenced by genetic factors as well; SNPs reported to influence average sleep duration or diurnal preference include:

Sleep/wake Fragmentation: