Manipulating stored phonological input during verbal working memory.
Manipulating stored phonological input during verbal working memory.
复制标题
在口头工作记忆中操纵存储的语音输入。
DOI：
10.1038/nn.4459
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发表时间：
2017-02
影响因子：
25
通讯作者：
Pesaran B
中科院分区：
文献类型：
--
作者：
Cogan GB;Iyer A;Melloni L;Thesen T;Friedman D;Doyle W;Devinsky O;Pesaran B
Verbal working memory (vWM), involves storing and manipulating information in phonological sensory input. An influential theory of vWM proposes that manipulation is carried out by a central executive while storage is performed by two interacting systems: A phonological input buffer that captures sound-based information and an articulatory rehearsal system that controls speech motor output. Whether, when, and how neural activity in the brain encodes these components remains unknown. Here, we read-out the contents of vWM from neural activity in human subjects as they manipulate stored speech sounds. As predicted, we identify storage systems that contain both phonological sensory and articulatory motor representations. Surprisingly however, we find that manipulation does not involve a single central executive but rather involves two systems with distinct contributions to successful manipulation. We propose, therefore, that multiple subsystems comprise the central executive needed to manipulate stored phonological input for articulatory motor output in vWM.
