Comparing Electrophysiological Correlates of Word Production in Immediate and Delayed Naming Through the Analysis of Word Age of Acquisition Effects
Comparing Electrophysiological Correlates of Word Production in Immediate and Delayed Naming Through the Analysis of Word Age of Acquisition Effects
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DOI：
10.1007/s10548-010-0162-x
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发表时间：
2011-03-01
期刊：
影响因子：
2.7
通讯作者：
Perret, Cyril
中科院分区：
文献类型：
--
作者：
Laganaro, Marina;Perret, Cyril
大多数分析言语产生的事件相关脑电位（ERP）的脑电图研究采用沉默的元语言任务或延迟或默契的图片命名，以避免可能的文物在运动准备。解释这些结果的一个核心问题是，这些任务中涉及的过程是否与公开的言语产生中涉及的过程具有可比性。在本研究中，我们解决了一个方法论问题的整合刺激对齐和响应对齐的ERP在立即公开的图片命名相比，延迟生产，再加上一个理论观点的影响，字年龄的收购（AoA）。高密度脑电图记录，波形分析和时空分割相结合的刺激对齐和响应对齐的ERP。相同的序列和持续时间的地形图出现在立即和延迟生产，直到图片发病后约350毫秒，揭示了类似的编码过程，直到语音编码的开始，但调制链接到字AoA只观察到在立即生产。考虑刺激对齐和响应对齐的ERP一起允许确定，一个稳定的地形开始约350毫秒持续30毫秒的时间比早期获得的单词晚收购。这种差异福尔斯属于语音编码的时间窗口，其调制可以与较长的生产延迟后获得的单词。
Most EEG studies analysing speech production with event related brain potential (ERP) have adopted silent metalinguistic tasks or delayed or tacit picture naming in order to avoid possible artefacts during motor preparation. A central issue in the interpretation of these results is whether the processes involved in those tasks are comparable to those involved in overt speech production. In the present study we addressed a methodological issue about the integration of stimulus-aligned and response-aligned ERPs in immediate overt picture naming in comparison to delayed production, coupled with a theoretical point on the effect of word Age of Acquisition (AoA). High density EEG recordings were used and waveform analyses and spatio-temporal segmentation were combined on stimulus-aligned and response-aligned ERPs. The same sequence and duration of topographic maps appeared in the immediate and delayed production until around 350 ms after picture onset, revealing similar encoding processes until the beginning of phonological encoding, but modulations linked to word AoA were only observed in the immediate production. Considering stimulus-aligned and response-aligned ERPs together allowed to identify that a stable topography starting around 350 ms lasts 30 ms longer for late-acquired than for early-acquired words. This difference falls within the time-window of phonological encoding and its modulation can be linked to the longer production latencies for late-acquired words.