预感陈奕迅下载:PRSBBS：阳刚男性有坚毅的下巴短粗的食指

FIG SOURCE：Sonja Windhager、Katrin Schaefer

柯克·道格拉斯（美国电影演员）可能凭借其突出的下巴，在《斯巴达克斯》和其他影片中抢到了许多可谓“男人中的男人”的角色。

然而星探们可能忽视了这些男演员的另一个更加男人的特征，那就是一根短而粗的食指。

科学家们已经发现，那些生有在传统上更为阳刚的下颚骨的男性——想一想道格拉斯那标志性的“裂缝”下巴，相对他们的无名指而言，往往其食指要更加短粗。

然而没有人知道这种规律在那些未到青春期的孩子中是否适用。

为了找到问题的答案，研究人员对17名年龄介于4岁到11岁的男孩进行了拍摄。

研究人员发现，千真万确，那些生有更小食指的孩子同时还有一个更大、更圆的下巴（右图所示）。

奥地利维也纳大学的人类学家Konstanze Meindl和同事在英国《皇家学会学报B》Proceedings of the Royal Society B: Biological Sciences 网络版上报告说，这些孩子同时还生有较小的额头与较粗的眉毛。

在子宫内的睾丸素水平较高或许有助于塑造手指的不协调以及男孩的脸，从而表明激素即便在生命的早期也具有非常重要的作用。

我们姑且将其称为小斯巴达克斯效应。（生物谷Bioon.com）

doi:10.1098/rspb.2011.2351
PMC:
PMID:

Second-to-fourth digit ratio and facial shape in boys: the lower the digit ratio, the more robust the face

Meindl, Konstanze; Windhager, Sonja; Wallner, Bernard; Schaefer, Katrin

During human ontogeny, testosterone has powerful organizational and activational effects on the male organism. This has ledto the hypothesis that the prenatal environment (as studied through the second-to-fourth digit ratio, 2D : 4D) is not onlyassociated with robust adult male faces that are perceived as dominant and masculine, but also that there is an activationalstep during puberty. To test the latter, we collected digit ratios and frontal photographs of right-handed Caucasian boys(aged 4–11 years) along with age, body height and body weight. Using geometric morphometrics, we show a significant relationshipbetween facial shape and 2D : 4D before the onset of puberty (explaining 14.5% of shape variation; p = 0.014 after 10 000 permutations, n = 17). Regression analyses depict the same shape patterns as in adults, namely that the lower the 2D : 4D, the smaller andshorter the forehead, the thicker the eyebrows, the wider and shorter the nose, and the larger the lower face. Our findingsadd to previous evidence that certain adult male facial characteristics that elicit attributions of masculinity and dominanceare determined very early in ontogeny. This has implications for future studies in various fields ranging from social perceptionto life-history strategies.