Sex differences in shock thresholds in rats and gerbils and the day-night cycle
نویسندگان
چکیده
Sex differences in shock thresholds in relation to the day-night cycle were examined in rats and gerbils using a modification of the flinch-jump technique. In rats, males had higher thresholds than females in both day and night tests, but the magnitude of the difference was greater during the night tests. This effect arose because females tested at night had lower thresholds than females tested in the day. Males were little affected by the day-night cycle. In gerbils there was no sex difference in shock thresholds either in day or night tests, but shock thresholds were lower at night than during the qay.
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