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首页> 外文期刊>The Journal of Neuroscience: The Official Journal of the Society for Neuroscience >A Trade-Off between Somatosensory and Auditory Related Brain Activity during Object Naming But Not Reading
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A Trade-Off between Somatosensory and Auditory Related Brain Activity during Object Naming But Not Reading

机译：对象命名但不读取过程中体感和听觉相关的大脑活动之间的权衡

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摘要

The parietal operculum, particularly the cytoarchitectonic area OP1 of the secondary somatosensory area (SII), is involved in somatosensory feedback. Using fMRI with 58 human subjects, we investigated task-dependent differences in SII/OP1 activity during three familiar speech production tasks: object naming, reading and repeatedly saying "1-2-3." Bilateral SII/OP1 was significantly suppressed (relative to rest) during object naming, to a lesser extent when repeatedly saying "1-2-3" and not at all during reading. These results cannot be explained by task difficulty but the contrasting difference between naming and reading illustrates how the demands on somatosensory activity change with task, even when motor output (i.e., production of object names) is matched. To investigate what determined SII/OP1 deactivation during object naming, we searched the whole brain for areas where activity increased as that in SII/OP1 decreased. This across subject covariance analysis revealed a region in the right superior temporal sulcus (STS) that lies within the auditory cortex, and is activated by auditory feedback during speech production. The tradeoff between activity in SII/OP1 and STS was not observed during reading, which showed significantly more activation than naming in both SII/OP1 and STS bilaterally. These findings suggest that, although object naming is more error prone than reading, subjects can afford to rely more or less on somatosensory or auditory feedback during naming. In contrast, fast and efficient error-free reading places more consistent demands on both types of feedback, perhaps because of the potential for increased competition between lexical and sublexical codes at the articulatory level.
机译：顶盖，特别是次要体感区（SII）的细胞结构区OP1参与体感反馈。我们使用功能磁共振成像技术对58位人类受试者进行了调查，研究了三种熟悉的语音产生任务中对象依赖的SII / OP1活动差异：对象命名，阅读和反复说“ 1-2-3”。在对象命名期间，双边SII / OP1被显着抑制（相对于静止），当反复说“ 1-2-3”时，其程度较小，而在阅读过程中则完全没有。这些结果不能用任务难度来解释，但是命名和阅读之间的对比差异说明了即使身体输出匹配（即对象名称的产生），对体感活动的要求也会随着任务的变化而变化。为了调查在对象命名过程中确定SII / OP1失活的原因，我们在整个大脑中搜索了活动随SII / OP1减少而增加的区域。这项跨主题协方差分析揭示了右上颞沟（STS）中位于听觉皮层内的区域，并在语音产生过程中被听觉反馈激活。在阅读过程中未观察到SII / OP1和STS的活性之间的权衡，这表明双方的激活远比命名SII / OP1和STS的激活多。这些发现表明，尽管对象命名比阅读更容易出错，但是对象在命名期间可以或多或少地依赖体感或听觉反馈。相反，快速有效的无错误阅读对两种类型的反馈都提出了更一致的要求，这可能是因为在发音层次上潜在的词法和次词法之间的竞争可能会加剧。

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