title: The echidna manifests typical characteristics of rapid eye movement sleep.
abstract: The failure to identify rapid eye movement sleep (REMS) in an early study of the echidna at an unmeasured ambient temperature (T(a)) was unexpected, as its brain stem structures resemble those that generate REMS in other mammals. However, typical mammalian REMS was evident in echidnas exposed to several T(a)s. The parallel presence of REMS in birds points to its reptilian origin.
authors.affiliation: Division of Anatomy and Physiology, University of Tasmania, Hobart, Tasmania, Australia.
authors.forename: S C
authors.initials: SC
authors.lastname: Nicol
authors.forename: N A
authors.initials: NA
authors.lastname: Andersen
authors.forename: N H
authors.initials: NH
authors.lastname: Phillips
authors.forename: R J
authors.initials: RJ
authors.lastname: Berger
mesh_terms: D000818:Animals; D001831:Body Temperature / Q000502:physiology*; D001921:Brain / Q000033:anatomy & histology / Q000502:physiology; D002940:Circadian Rhythm / Q000502:physiology; D004569:Electroencephalography; D005260:Female; D008297:Male; D012895:Sleep, REM / Q000502:physiology*; D004442:Tachyglossidae / Q000033:anatomy & histology / Q000502:physiology*; D013997:Time Factors