Abstract:
:To assess the effects of early postnatal undernutrition upon the developing abilities of infant and juvenile mice to acquire and retain a passive-avoidance response, we reared mice following birth in either "normally nourished" or "undernourished" conditions by maintaining litter sizes of 6 or 16, respectively. At ages ranging from 7 to 21 days, mice from each nutritional condition were trained to withhold stepping off from a small vibrating platform in order to avoid shock. Following training to a common criterion, separate groups of mice were retained to the same criterion either 1 or 24 hr later. From the comparisons with yoked control groups at each age and retention interval, we conclude that although undernutrition results in some age-related differences in the ability to withhold responding, these are quite small during acquisition within each age group. In contrast, the retention data suggest that undernutrition delayed the development of both short- and long-term memory abilities on this task. In general, these results are similar to earlier data involving discriminated shock-escape wherein undernutrition had little apparent effect upon acquisition at the early ages but rather marked effects upon developing memory system.
journal_name
Dev Psychobioljournal_title
Developmental psychobiologyauthors
Nagy ZM,Porada KJ,Monsour APdoi
10.1002/dev.420130404subject
Has Abstractpub_date
1980-07-01 00:00:00pages
373-84issue
4eissn
0012-1630issn
1098-2302journal_volume
13pub_type
杂志文章abstract::The capacity to effortfully control or regulate behavior is of central importance in social development. Individual differences in effortful control have been hypothesized to reflect biologically based, temperamental variation among children. Posner and Rothbart (1994, 1998) have argued that the anterior attention sys...
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journal_title:Developmental psychobiology
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