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首页> 外文期刊>Neuron >Human dorsal and ventral auditory streams subserve rehearsal-based and echoic processes during verbal working memory.
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Human dorsal and ventral auditory streams subserve rehearsal-based and echoic processes during verbal working memory.

机译：人类的背侧和腹侧听觉流在口头工作记忆中为基于排练和回声的过程提供服务。

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To hear a sequence of words and repeat them requires sensory-motor processing and something more-temporary storage. We investigated neural mechanisms of verbal memory by using fMRI and a task designed to tease apart perceptually based ("echoic") memory from phonological-articulatory memory. Sets of two- or three-word pairs were presented bimodally, followed by a cue indicating from which modality (auditory or visual) items were to be retrieved and rehearsed over a delay. Although delay-period activation in the planum temporale (PT) was insensible to the source modality and showed sustained delay-period activity, the superior temporal gyrus (STG) activated more vigorously when the retrieved items had arrived to the auditory modality and showed transient delay-period activity. Functional connectivity analysis revealed two topographically distinct fronto-temporal circuits, with STG co-activating more strongly with ventrolateral prefrontal cortex and PT co-activating more strongly with dorsolateral prefrontal cortex. These argue for separate contributions of ventral and dorsal auditory streams in verbal working memory.
机译：要听到一个单词序列并重复它们，需要感觉运动处理和一些临时存储。我们通过使用功能磁共振成像和旨在从语音发音发音记忆中分离出基于感知的（“回声”）记忆的任务研究了言语记忆的神经机制。一组两词或三词对以双峰形式呈现，然后是提示，指示从哪个模态（听觉或视觉）项目中检索并经过一段时间的延迟进行演练。尽管在颞颞（PT）的延迟期激活对源模态不敏感并且显示出持续的延迟期活动，但是当检索到的物品到达听觉模态并显示出短暂的延迟时，上颞回（STG）更加活跃。期活动。功能连通性分析揭示了两个在地形上截然不同的额颞叶回路，STG与腹外侧前额叶皮层更强地共同激活，而PT与背外侧前额叶皮层更强地共同激活。这些证明了口头和背侧听觉流在言语工作记忆中的独立贡献。

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