Genetic and environmental influences on emotion-modulated startle reflex: A twin study

被引:35
作者
Anokhin, Andrey P. [1 ]
Golosheykin, Simon [1 ]
Heath, Andrew C. [1 ]
机构
[1] Washington Univ, Sch Med, Dept Psychiat, St Louis, MO 63108 USA
关键词
startle reflex; emotion; affective pictures; twins; heritability;
D O I
10.1111/j.1469-8986.2006.004863x
中图分类号
B84 [心理学];
学科分类号
04 ; 0402 ;
摘要
Emotion-modulated startle reflex is an important indicator of traitlike differences in affective processing implicated in the biological basis of personality and psychopathology. This study examined heritability of startle modulation by affective pictures in 66 pairs of monozygotic and 57 pairs of dizygotic female twins. Consistent with previous studies, startle magnitude was significantly influenced by emotional valence of the picture (positive < neutral < negative). Absolute response magnitude showed high heritability in all three valence conditions (59-61 %); however, there were no significant genetic influences on the amount of startle modulation. Thus, our data do not support the hypothesis that emotion-modulated startle can serve as an indicator of genetically transmitted individual differences in affective processing.
引用
收藏
页码:106 / 112
页数:7
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