Effects of isolation rearing on startle reactivity, habituation, and prepulse inhibition in male Lewis, Sprague-Dawley, and Fischer F344 rats

被引:90
作者
Varty, GB [1 ]
Geyer, MA [1 ]
机构
[1] Univ Calif San Diego, Dept Psychiat, La Jolla, CA 92093 USA
关键词
D O I
10.1037/0735-7044.112.6.1450
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
This study compared the interaction of strain with isolation rearing on startle reactivity, habituation, and prepulse inhibition (PPI) in male Lewis, Sprague-Dawley, and Fischer F344 rats tested as adults. Lewis and Fischer rats exhibited lower startle reactivity than Sprague-Dawley rats. Lewis rats displayed more rapid habituation than the other strains. Most important, isolation rearing produced deficits in PPI in both Sprague-Dawley and Fischer rats but had no effect in Lewis rats. By contrast, isolation rearing had no effect on startle reactivity or habituation. In a separate study, 0.5 mg/kg apomorphine disrupted PPI in Fischer but not in Lewis rats. Thus. PPI in Lewis rats is relatively unaffected by either a pharmacological or a developmental manipulation, both of which disrupt PPI in Sprague-Dawley and Fischer F344 rats.
引用
收藏
页码:1450 / 1457
页数:8
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