8月11日,美国研究人员发表报告称,他们在恒河猴幼猴大脑中发现两个感应焦虑的区域。他们认为,在人类幼儿大脑中类似区域可能发挥着同样作用。这项研究成果发表在英国《自然》(Nature)杂志上。
利用正电子发射计算机断层扫描技术,美国威斯康星-麦迪逊大学研究人员测试了238只幼年恒河猴面对威胁时的大脑活动。结果显示,恒河猴越焦虑,其大脑杏仁中央核及海马前区的活动越剧烈。反之,根据上述两个区域的活动情况,也可判断幼猴的焦虑程度。
研究人员说,一些儿童或青少年表现出焦虑症的早期征象,例如异常害羞、惧怕陌生人等,这些人长大成人后,很可能通过酒精、大麻等进行自我治疗。如能证实上述两个区域也是人类幼儿的焦虑反应区,将有助于对患焦虑症风险较高的儿童提前给予介入治疗。
推荐原文出处:
Nature doi:10.1038/466827a
Behavioural neuroscience: Genes and the anxious brain
Andreas Meyer-Lindenberg1
Some people are naturally more anxious than others. A brain-imaging study in monkeys provides surprising insights into which brain regions are under the influence of genes in this phenomenon and which are not.
How anxiously we react to threat or adversity is part of our personality. This stable characteristic is called trait anxiety, and those with high trait anxiety are more prone to mental disorders such as depression, substance abuse and psychosis1.