Differential effects of cohort removal stress on the acoustic startle response of the Roman/Verh rat strains

被引：18

作者：

Aguilar, R ^{[1
]}

Gil, L ^{[1
]}

Tobeña, A ^{[1
]}

Escorihuela, RM ^{[1
]}

Fernández-Teruel, A ^{[1
]}

机构：

[1] Autonomous Univ Barcelona, Sch Med, Dept Psychiat & Forens Med, Med Psychol Unit, Bellaterra 08193, Barcelona, Spain

来源：

BEHAVIOR GENETICS | 2000年 / 30卷 / 01期

关键词：

genetic selection; emotionality; anxiety; amygdala; acoustic startle responses; cohort removal; isolation stress;

D O I：

10.1023/A:1002042711672

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：

Male and female rats of the inbred Roman/Verh strains, which have been psychogenetically selected and bred for good (RHA-I/Verh) and extremely poor (RLA-I/Verh) two-way avoidance acquisition, were evaluated in an acoustic startle response test. One half of the rats of each strain and sex were previously subjected to 30 min of isolation by removal of their cage partners ("cohort removal"). During the testing session each animal received 40 acoustic stimuli at interstimulus intervals of 30 seconds. The hyperemotional RLA-I/Verh rats (especially the males) showed stronger acoustic startle responses than did their RHA-I/Verh counterparts. Startle amplitudes of the RLA-I/Verh males were further enhanced by the stress of 30 min isolation, whereas cohort removal did not significantly affect startle response amplitudes in RHA-I/Verh rats of either sex or in females of the RLA-I/Verh strain.

引用

页码：71 / 75

页数：5

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