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Total minutes spent in rapid eye movement (REM) (A), non-REM (NREM) (B), and wake (C) during baseline in ovariectomized (OVX) rats after EB (black lines) and oil (gray lines) injections. Time of day is expressed as Zeitgeber time (ZT), where ZT 0 = lights on, indicated below LD bar on X-axis. *P < 0.05 vs. oil.
