Editing Delta wave (section)

===Parasomnias===

[[Parasomnias]], a category of [[sleep disorders]], are often associated with disruptions in slow wave sleep. [[Sleep walking]] and sleep talking most often occur during periods of high delta wave activity. Sleep walkers have also been shown to have more hypersynchronous delta activity (HSD) compared to total time spent in stages 2, 3, and 4 sleep relative to healthy controls. HSD refers to the presence of continuous, high-voltage (> 150 μV) delta waves seen in sleep EEGs.<ref name="ReferenceA">Pilon M; Zadra A; Joncas S et al. Hypersynchronous delta waves and somnambulism: brain topography and effect of sleep deprivation. SLEEP 2006;29(1): 77–84.</ref> Parasomnias which occur deep in NREM sleep also include [[sleep terrors]] and confusional arousals.