Effects of prenatal maternal handling on the maturation of rhythmic processes.
- 1 January 1970
- journal article
- Published by American Psychological Association (APA) in Journal of Comparative and Physiological Psychology
- Vol. 71 (3) , 492-496
- https://doi.org/10.1037/h0029139
Abstract
Offspring of Charles River rats handled throughout pregnancy and offspring of nonhandled animals were fostered to nonhandled females and reared under a 12-hr light-dark cycle. Controls displayed the characteristic 24-hr rhythm in adrenocortical activity at 25 days of age. In prenatally handled Ss the rhythm was present at 18 days. The 24-hr rhythm in overt activity characteristic of the adult rat was 1st observed at 7 days of age in unmanipulated controls whereas prenatally handled Ss displayed rhythmicity at 5 days of age. (PsycINFO Database Record (c) 2006 APA, all rights reserved)Keywords
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