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The effects of age and isolation period on two phases of behavioral response to foot shock in isolation‐reared rats
Author(s) -
Arakawa Hiroyuki
Publication year - 2002
Publication title -
developmental psychobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 93
eISSN - 1098-2302
pISSN - 0012-1630
DOI - 10.1002/dev.10040
Subject(s) - thrashing , jumping , shock (circulatory) , isolation (microbiology) , foot (prosody) , psychology , biology , physiology , medicine , linguistics , philosophy , parallel computing , computer science , microbiology and biotechnology
Abstract Using rats as subjects, the effects of a period of isolation and the subjects' age during isolation on the response to foot shock were systematically examined in three experiments. Both the thresholds of shock that evoked a jumping response and that evoked a thrashing response were measured. The results suggest that the threshold for jumping response decreased when rats were isolated during the postweaning stage of development. On the other hand, the threshold for thrashing response decreased when the subjects were isolated for more than 39 days, independently of their age during isolation. Possible causes of the differential effects of these two factors are discussed in relation to the developmental process of these two behavioral indices. © 2002 Wiley Periodicals, Inc. Dev Psychobiol 41: 15–24, 2002. Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/dev.10040