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• W4308486814 endingPage "114011" @default.
• W4308486814 startingPage "114011" @default.
• W4308486814 abstract "Sleep deprivation is a feature shared by most studied mammals at some point during the postpartum period. Unlike the rabbit, the pig, or the human mother, sleep has been claimed as an essential state for milk ejection in mother rats, where sleep deprivation using gentle handling (GH) prevents milk ejection and pup weight gain. Though sleep deprivation is a stressful situation itself, most common methodologies used in laboratory animals, including GH, usually involve aversive stimulus to prevent sleep, adding further stress to the animal. Deep brain electrical stimulation (DBES) of the brainstem reticular formation is a less common technique used to prevent sleep, and while this methodology may also carry unwanted effects, it avoids stressful conditions. In the present study, we examined the relationship between sleep and nursing, and how different sleep deprivation methodologies impact nursing and lactation. For this purpose, we carried out two sets of experiments. First, we correlated sleep and waking states with different nursing parameters of lactating rats under undisturbed conditions. Second, we slept deprived another group of mother rats using two different techniques: GH and DBES. Our main findings show that sleeping time was positively correlated with the time devote to nurse the pups, but not either with milk ejection or pup weight gain. When mother rats were sleep deprived, maternal behavior was fragmented using both methods, but was substantially more disrupted when using GH. Additionally, lactating dams were capable of ejecting milk and their pups gained weight despite of being sleep deprived using both techniques, but these parameters were significantly reduced using GH compared to control values, while DBES did not differ from control group. Overall, these results suggest that sleep and nursing are behaviorally compatible, but in disagreement with previous findings, we concluded that sleep is not necessary for milk ejection. These observations have critical implications for using the rat as a model to explore sleep loss during the postpartum period." @default.
• W4308486814 created "2022-11-12" @default.
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• W4308486814 date "2023-01-01" @default.
• W4308486814 modified "2023-09-27" @default.
• W4308486814 title "Is sleep critical for lactation in rat?" @default.
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• W4308486814 doi "https://doi.org/10.1016/j.physbeh.2022.114011" @default.
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