Nat Commun:青春期的大脑活动变化有益于学习

2017-12-20 佚名 生物360

过去被认为与冒险行为增加相关的青春期脑区活动变化,似乎也有益于反馈学习,而且青春期可能是唯一的反馈学习表现上升的生命阶段。相关发现已发表于《自然 - 通讯》。

过去被认为与冒险行为增加相关的青春期脑区活动变化,似乎也有益于反馈学习,而且青春期可能是唯一的反馈学习表现上升的生命阶段。相关发现已发表于《自然 - 通讯》。

过去的研究已经表明,对奖赏敏感的脑区(纹状体)在青春期的活动比在其它生命阶段更活跃。但是,这一点一般被和冒险行为增加及负面健康后果联系在一起。

在本论文中,Sabine Peters 和 Eveline Crone 表明这种敏感性也存在正面效果。他们研究了 230 多名(人数在个体评估阶段有变化)年龄在 8 -25 岁之间的被试。每一名被试都要完成一项反馈学习任务(表现好的将获得正面反馈),期间接受功能性磁共振成像扫描。被试接受三次评估,意味着作者可以获得 8 -29 岁被试的纵向数据。 结果显示纹状体活动对反馈有响应,而且这种响应在 17-20 岁被试中间最强烈。个体在学习期间对反馈的敏感性越强,他们目前以及将来的学习表现越好。

综合而言,以上发现表明,虽然对奖赏的敏感性上升一般与青春期负面行为联系在一起,但是它也可以被正面利用,能够有益于学习。

原始出处:

S. Peters & E. A. Crone. Increased striatal activity in adolescence benefits learning. Nature Communications 8, Article number: 1983 (2017) doi:10.1038/s41467-017-02174-z.

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    2018-04-28 liuli5079
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    2018-01-31 liye789132251
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    2017-12-21 139****5926

    好好文章学习了

    0

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    2017-12-20 惠映实验室

    学习了.谢谢.

    0

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