期刊
DEVELOPMENTAL PSYCHOBIOLOGY
卷 57, 期 1, 页码 63-72出版社
WILEY
DOI: 10.1002/dev.21258
关键词
ultrasonic vocalization; isolation; maternal potentiation; maternal separation; maternal reunion; maternal odor; olfaction; contact quieting; neonatal intensive care
资金
- New York State Office of Mental Health
In a paradigm that may serve as a translational model for maternal separation experiences of human infants in neonatal intensive care units, we examined how the duration of reunion with the dam influenced the phenomenon of maternal potentiation of ultrasonic vocalizations, in which isolated rat pups increase rates of vocalization following brief interactions with dams. We report that maternal potentiation in 12-13 day-old rats did not occur after reunions with their anesthetized dam that lasted longer than 15-min. However, after 18hr maternal separation, isolated pups given reunions with their anesthetized dam increased vocalization rate even with reunions as long as 3hr. Using a split-cage apparatus that prevented physical contact, the impact of 18hr separations on maternal potentiation was partially offset by experiencing olfactory and/or auditory stimuli of the mother. These results suggest that maintaining partial maternal sensory exposure during prolonged maternal separation can reduce responses elicited by subsequent maternal separation. (c) 2014 Wiley Periodicals, Inc. Dev Psychobiol 57: 63-72, 2015.
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