title: The sleep of conjoined twins.
abstract: Conjoined twins with a common heart system and circulatory system were observed during the 14th and 15th days for 11 hr. Sleep, Waking, and Quiet and Active Sleep were recorded in minute intervals. Clear independence of sleep and waking was manifest, and total independence of Quiet and Active sleep was noted.
mesh_terms: D006801:Humans; D007231:Infant, Newborn; D008297:Male; D012894:Sleep Stages; D012895:Sleep, REM; D014428:Twins, Conjoined / Q000523:psychology*; D014851:Wakefulness