Abstract
Previous studies in our laboratory have shown that even short-term separation of preweanling rat pups from the mother produces adverse effects in the pup. These include alterations in ornithine decarboxylase activity and in the secretion of growth hormone and corticosterone. The present study demonstrates that while intermittent heavy stroking effectively reverses or prevents all the changes associated with maternal deprivation neither kinesthetic nor vestibular stimulation affects these responses. The results verify earlier findings from this laboratory indicating that tactile interactions between rat pups and their mother modulate pup physiology and provide experimental support for the hypothesized role of tactile stimuli on early infant development.
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