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The modulating effect of an intrathecally (i.t.) administered 5-HT 1A agonist and an NMDA antagonist on sleep, waking and EEG power spectra was investigated in rats. The 5-HT 1A agonist 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT) (38 nmol) increased total slow wave sleep (TSWS) and decreased waking over the 8 h recording period. The TSWS increase was mostly due to an increase...
Sleep, waking, and EEG power spectra were investigated in rats with spinal 5,6-dihydroxytryptamine (5,6-DHT) lesions, following 20 mg/kg zimeldine or vehicle IP injections. 5,6-DHT selectively lesioned the descending serotonergic pathways. Lesion alone did not change sleep and waking stages compared to baseline, except for a reduction in REM sleep. Consistent with earlier findings, zimeldine in...
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