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Articles in PresS, published online ahead of print October 10, 2002
Am J Physiol Regu Physiol, 10.1152/ajpregu.00045.2002
Submitted on January 23, 2002
Accepted on October 4, 2002
1 Department of Environmental Health, Nara Women's University, Nara, Japan
* To whom correspondence should be addressed. E-mail: k.miki{at}cc.nara-wu.ac.jp.
The relationship between renal sympathetic nerve activity (RSNA) and systemic arterial pressure obtained during rapid eye movement (REM) sleep was compared with that obtained in other sleep and awake states. Electrodes for the measurements of RSNA, electrocardiogram, electromyogram, and electroencephalogram and a catheter for the measurement of systemic arterial pressure were implanted under aseptic condition at least 5 days before the experiment. During the transition from NREM to REM sleep, RSNA and heart rate (HR) decreased immediately by 46 ± 2 % (P<0.05) and 22 ± 3 beats/min (P<0.05), respectively, over 3 s after the onset of REM sleep. Meanwhile, systemic arterial pressure increased gradually after the onset of REM sleep, which was apparently independent of the changes in RSNA. During REM sleep, the relationships between RSNA/HR and systemic arterial pressure were dissociated compared with that obtained during the other behavioral states. These data indicate that the inter-dependency between systemic arterial pressure and RSNA during REM sleep is likely to be modified compared with other behavioral states.
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