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    PNAS:說兩種語言或可引起大腦變化
    2012-06-07 15:37:47   來源:生物谷   評論:0 點擊:

    在語言形成過程中,大腦會發出信號,可以觀察到能說兩種語言的人,與語言和認知處理有關的大腦活動可能會發生變化。近日,刊登在《美國科學院院刊》(PNAS)的研究報告指出,與只能講一種語言的人相比,能說兩種...

     在語言形成過程中,大腦會發出信號,可以觀察到能說兩種語言的人,與語言和認知處理有關的大腦活動可能會發生變化。

    近日,刊登在《美國科學院院刊》(PNAS)的研究報告指出,與只能講一種語言的人相比,能說兩種語言的人的大腦皮層區域會產生功能性和結構性變化,這可能來源于其對語言的加工和執行。科研人員已經確定了會講兩種語言可能帶來與語言和認知處理有關的大腦活動的變化。

    正如玩戲法的人的大腦其與儲存和處理復雜視覺運動有關的區域可能會出結構的變化一樣,西北大學神經系統研究所的Nina Kraus及其同事們推測,由實踐驅動的聲音處理能力引起的大腦變化在能講兩種語言的人的大腦中或許是可識別的。為了尋找這類變化,該實驗小組征召了芝加哥的48名中學生,其中大約一半人只講英語,而另一半既講英語又講西班牙語。

    研究人員將這些志愿者進行了分組,每個組都有數量大致相同的男性和女性。當他們看一部電影的時候,研究人員使用電生理技術測量了每一名志愿者的大腦對于記錄一個合成語音音節的能力——這個音節既被單獨播放,又放到了經錄制的亂哄哄的人類語音背景中播放。研究結果顯示,與只能說一種語言的人相比,能說兩種語言的人表現出了增強這個音節基頻的相關大腦皮層活動,特別是在這個聲音放在亂哄哄的語音背景中播放的時候。研究者表示,這些發現提示能說兩種語言的人可能擁有維持選擇性注意力和增強聽覺分類的能力。

    http://www.bioon.com/biology/neuroscience/523310.shtml

    相關熱詞搜索:語言區 大腦功能

    上一篇:PNAS:研究稱人腦內部有“測謊儀” 懷疑他人時啟動
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