那些總擔(dān)心因?yàn)槟昙o(jì)增長而變成“老糊涂”的人也許應(yīng)該觀察一下自己的臉型,，因?yàn)橛豁?xiàng)最新研究稱,，臉型的對稱程度與人到老年的智商之間存在聯(lián)系。
英國愛丁堡大學(xué)研究人員在新一期美國《進(jìn)化與人類行為》（Evolution and Human Behavior）雜志上報(bào)告說,，他們找到了1932年英國數(shù)百名11歲大的兒童智商測試的數(shù)據(jù),，然后又為其中還健在的200多名老人在79歲和83歲時(shí)進(jìn)行了智商測試，并對他們的臉部進(jìn)行了攝像分析,。
研究人員發(fā)現(xiàn),，臉部的對稱程度與79歲到83歲之間的智商變化有一定聯(lián)系，臉型越對稱的人越不容易變成“老糊涂”,。這里的臉型對稱與臉部皮膚或脂肪沒有關(guān)系,，指的是臉上眼、耳,、鼻,、口等位置的對稱。
不過,，研究只發(fā)現(xiàn)在男性身上存在這種聯(lián)系,，而女性沒有。研究人員解釋說,，這可能是因?yàn)榕员饶行詨勖L,，這一項(xiàng)目中的女性對象的年齡還不足夠老，沒有到生命最后三四年智商迅速下降的時(shí)候,。
研究人員說,，臉型對稱與老年智商之間有聯(lián)系，可能是因?yàn)闆Q定臉型的基因與保持大腦活力的基因之間存在某種關(guān)系,。由于目前還沒有發(fā)現(xiàn)一個(gè)能獨(dú)立解釋老年智商下降的因素,，臉型對稱程度也許可以作為一個(gè)重要指標(biāo),，用于醫(yī)療中辨認(rèn)那些可能出現(xiàn)相關(guān)疾病的患者。（生物谷Bioon.com）
生物谷推薦原始出處：
Evolution and Human Behavior doi:10.1016/j.evolhumbehav.2009.06.001
Symmetric faces are a sign of successful cognitive aging
Lars Penkeab, Timothy C. Batesa, Alan J. Gowab, Alison Pattiea, John M. Starrab, Benedict C. Jonesc, David I. Perrettd, Ian J. Dearyab
It has been proposed that a common cause underlies individual differences in bodily and cognitive decline in old age. No good marker for this common cause has been identified to date. Here, fluctuating asymmetry (FA), an indicator of developmental stability that relates to intelligence differences in young adults, was measured from facial photographs of 216 surviving members of the Lothian Birth Cohort 1921 at age 83 and related to their intelligence at ages 11, 79 and 83 years. FA at age 83 was unrelated to intelligence at ages 11 and 79 and to cognitive change between 11 and 79 years. It was, however, associated with intelligence and information processing efficiency at age 83 and with cognitive change between 79 and 83 years. Significant results were limited to men, a result predicted by sex differences in life history tradeoffs and life expectancy. Results were stronger when directional asymmetries were corrected in facial FA measures. Thus, FA is a candidate marker for the common cause of differential senescence.
