Decoding vowels and consonants in spoken and imagined words using electrocorticographic signals in humans.

Decoding vowels and consonants in spoken and imagined words using electrocorticographic signals in humans.
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DOI:
10.1088/1741-2560/8/4/046028
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发表时间:
2011-08
影响因子:
4
通讯作者:
Schalk G
Schalk G
中科院分区:
工程技术2区
文献类型:
--
作者:
Pei X;Barbour DL;Leuthardt EC;Schalk G

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大众媒体上的几个故事推测,从一个人的大脑中可以推断出他在说什么,甚至在想什么。虽然最近的研究表明,大脑信号可以提供有关实际和想象行为的详细信息,例如不同类型的肢体运动或说话,但关于“读心”的可能性的具体实验证据,即解释内部产生的语言,一直很少。在这项研究中,我们发现有可能使用从大脑表面记录的信号(皮质电图(ECoG))来区分语音和想象单词中的元音和辅音,并且我们定义了包含元音和辅音辨别信息最多的皮层区域。研究结果揭示了与元音和辅音产生相关的独特机制,并可能为利用想象语音进行基于大脑的交流提供基础。
Several stories in the popular media have speculated that it may be possible to infer from the brain which word a person is speaking or even thinking. While recent studies have demonstrated that brain signals can give detailed information about actual and imagined actions, such as different types of limb movements or spoken words, concrete experimental evidence for the possibility to “read the mind,” i.e., to interpret internally-generated speech, has been scarce. In this study, we found that it is possible to use signals recorded from the surface of the brain (electrocorticography (ECoG)) to discriminate the vowels and consonants embedded in spoken and in imagined words, and we defined the cortical areas that held the most information about discrimination of the vowels and consonants. The results shed light on the distinct mechanisms associated with production of vowels and consonants, and could provide the basis for brainbased communication using imagined speech.
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