Finger Length Ratio (2D:4D) in Left- and Right-Handed Males

被引：30
作者：
Stoyanov, Zlatislav [1 ]
Marinov, Miroslav [1 ]
Pashalieva, Irina [1 ]
机构：
[1] Med Univ Prof Paraskev Stoyanov, Dept Physiol & Pathophysiol, Varna 9002, Bulgaria
来源：
INTERNATIONAL JOURNAL OF NEUROSCIENCE | 2009年 / 119卷 / 07期
关键词：
finger length ratio (2D:4D); handedness; left- and right-handers; testosterone; 4TH DIGIT LENGTH; CEREBRAL LATERALIZATION; BIOLOGICAL MECHANISMS; FETAL TESTOSTERONE; 2D-4D; 2ND; ASSOCIATIONS; PERFORMANCE; HYPOTHESIS; ASYMMETRY;
D O I：
10.1080/03008200802323883
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
The finger length ratio (2D:4D) is a biomarker for the prenatal levels of testosterone. The prenatal effects of testosterone on the development of brain hemispheres are considered as a key factor in the etiology of left-handedness. We tested whether 2D:4D correlates with the type of handedness in males (18 right-handers and 18 left-handers). Right hand 2D:4D, left hand 2D:4D, average 2D:4D, and the difference between right and left 2D:4D (Dr-l) were compared. The value of Dr-l in left-handers was significantly lower than Dr-l in right-handers. This result can be interpreted as proof that left-handers were subjected to higher levels of testosterone in utero.
引用
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页码：1006 / 1013
页数：8
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