Webber C E, Garnett E S
J Anat. 1976 Feb;121(Pt 1):203-5.
The absolute density of the right and left os calcis has been measured in a group of healthy, sedentary volunteers. There was a significant difference between the density of the right and left os calcis in 90% of the subjects. Statistically, when all of the subjects were considered, the side on which the os calcis was denser was also the side of hand preference. Since there was no evidence, in the present study, of the environment having encouraged the use of one foot rather than the other, it is concluded that the concordance between upper limb dominance and greater density of the ipsilateral os calcis must have been determined before birth.
在一组健康的久坐志愿者中测量了左右跟骨的绝对密度。90%的受试者左右跟骨密度存在显著差异。从统计学角度来看，当考虑所有受试者时，跟骨密度较高的一侧也是优势手所在的一侧。由于在本研究中没有证据表明环境促使使用一只脚而非另一只脚，因此得出结论，上肢优势与同侧跟骨更高密度之间的一致性肯定在出生前就已确定。
