recurrent isolated sleep paralysis nightmare disorder other parasomnias exploding head syndrome sleep-related hallucinations sleep enuresis parasomnia due to a medical disorder parasomnia due to a medication or substance parasomnia, unspecified isolated symptoms and normal variants sleep talking 6. sleep-related movement disorders restless legs syndrome periodic limb movement disorder sleep-related leg cramps sleep-related bruxism sleep-related rhythmic movement disorder benign sleep myoclonus of infancy propriospinal myoclonus at sleep onset sleep-related movement disorder due to a medical disorder sleep-related movement disorder due to a medication or substance sleep-related movement disorder, unspecified isolated symptoms and normal variants excessive fragmentary myoclonus hypnagogic foot tremor and alternating leg muscle activation sleep starts (hypnic jerks) 7. other sleep disorders other sleep-related symptoms or events that do not meet the standard definition of a sleep disorder