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Neural correlates of spoken word production in semantic and phonological blocked cyclic naming

机译：语义和语音封闭循环命名的语义和语音封闭式循环命名的神经相关性

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摘要

The blocked cyclic naming paradigm has been increasingly employed to investigate the mechanisms underlying spoken word production. Semantic homogeneity typically elicits longer naming latencies than heterogeneity; however, it is debated whether competitive lexical selection or incremental learning underlies this effect. The current study manipulated both semantic and phonological homogeneity and used behavioural and electrophysiological measurements to provide evidence that can distinguish between the two accounts. Results show that naming latencies are longer in semantically homogeneous blocks, but shorter in phonologically homogeneous blocks, relative to heterogeneity. The semantic factor significantly modulates electrophysiological waveforms from 200ms and the phonological factor from 350ms after picture presentation. A positive component was demonstrated in both manipulations, possibly reflecting a task-related top-down bias in performing blocked cyclic naming. These results provide novel insights into the neural correlates of blocked cyclic naming and further contribute to the understanding of spoken word production.
机译：被封锁的循环命名范式越来越多地用于调查语音生产的机制。语义均匀性通常比异质性更长的命名延迟。但是，争论是否有竞争性词汇选择或增量学习是否受到这种效果。目前的研究操纵了语义和语音均匀性，并使用了行为和电生理学测量来提供可以区分这两个账户的证据。结果表明，命名延迟在语义均匀块中更长，但相对于异质性，在语音均匀块中较短。语义因子显着调节200ms的电生理波形和图像呈现后350ms的电生理波形。在两个操纵中证明了阳性成分，可能反映了在执行阻塞循环命名的任务相关的自上而下偏压。这些结果提供了对封锁循环命名的神经相关性的新颖见解，进一步有助于了解口语发言。

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