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Hippocampus:甜食可增强记忆

2015-11-18 佚名 生物谷

                             近日,来自美国的科学家发现吃甜食会促进脑部形成与之相关的情景记忆(情景记忆是在特定时间和地点对自身经历形成的记忆),而情景记忆对于健康饮食习惯的形成具有重要影响。相关研究结果发表在国

                            

近日,来自美国的科学家发现吃甜食会促进脑部形成与之相关的情景记忆(情景记忆是在特定时间和地点对自身经历形成的记忆),而情景记忆对于健康饮食习惯的形成具有重要影响。相关研究结果发表在国际学术期刊Hippocampus上。
 
在这项研究中,研究人员发现在给大鼠喂食含有蔗糖或者糖精的甜味食物后,大鼠背侧海马神经元中一种叫做ARC的突触可塑性标记蛋白的表达显著增加,这表明在吃甜食的过程中位于背侧海马体的神经元会发生激活,促进了情景记忆的形成。
 
Marise Parent教授这样说道:"我们认为情景记忆能够控制进食行为,比如我们会告诉自己'我已经吃了一顿大餐,不能再吃了',而我们之所以会做出这样的决定就是因为我们已经形成了关于进食时间和进食内容的记忆。"
 
之前的研究表明短暂抑制背侧海马体神经元的活性,再给予含有蔗糖的食物,会缩短大鼠的进食间隔时间,让它们吃得更多。因此形成餐时记忆对于健康饮食非常重要,有研究表明通过看电视等方式扰乱人类餐时记忆的形成,会增加下一餐的进食量,研究人员还发现患有健忘症的人不能对进食形成记忆,因此即使已经吃过饭,他们还会在有食物出现的情况下继续吃。
 
Parent表示,为了了解能量调节过程和肥胖发生原因,科学家们必须了解大脑如何控制进食的发生和频率。
 
该研究团队将会进一步确定营养均衡的液态以及固态食物是否对背侧海马神经元的ARC表达具有相同作用,同时还会对ARC表达增加是否是甜食记忆形成所必须的条件进行进一步探究。

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    2016-06-30 zhwj
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    2015-12-02 whmdzju
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    2016-04-12 smlt2008

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