Abstract:
:We have studied diurnal changes in mean arterial pressure (MAP), heart rate (HR) and body temperature (Tb) during wake (W), non-rapid eye movement sleep (NREMS) and REM sleep (REMS) in the rat. Although HR and Tb show a similar sinusoidal diurnal variation during all vigilance states, the diurnal profile for the MAP is vigilance-state dependent. During W, MAP values are higher during the dark phase, during NREMS, no significant diurnal change is seen, and during REMS, the MAP exhibits a reversed diurnal change, being higher during the light phase. The low frequency component (0.25 - 0.725 Hz) in the power spectral density of the blood pressure, and index of sympathetic activity, is also higher during the light phase than the dark phase in REMS. The present findings suggest that diurnal changes in MAP in the rat result from the wake rhythm, and that the mechanism for the diurnal control of MAP may be different from that for HR or Tb.
journal_name
J Sleep Resjournal_title
Journal of sleep researchauthors
Sei H,Furuno N,Morita Ydoi
10.1046/j.1365-2869.1997.00038.xsubject
Has Abstractpub_date
1997-06-01 00:00:00pages
113-9issue
2eissn
0962-1105issn
1365-2869journal_volume
6pub_type
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