Abstract
The 24 h variation in the passive avoidance response of rats was measured. Different groups of 18 animals were tested at 4 hourly intervals throughout 24 h. In all cases, retention was measured 48 h after the first trial. All animals were housed under controlled conditions for 14 days before testing. A significant 24-h rhythm in passive avoidance response was found, the maximum and minimum effects being in the middle of the light and dark phases respectively.
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Davies, J.A., Navaratnam, V. & Redfern, P.H. A 24-hour rhythm in passive-avoidance behaviour in rats. Psychopharmacologia 32, 211–214 (1973). https://doi.org/10.1007/BF00428692
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DOI: https://doi.org/10.1007/BF00428692