Microstate ERP Analyses to Pinpoint the Articulatory Onset in Speech Production.
Microstate ERP Analyses to Pinpoint the Articulatory Onset in Speech Production.
复制标题
DOI：
10.1007/s10548-020-00803-3
复制
发表时间：
2021-01
期刊：
影响因子：
2.7
通讯作者：
Laganaro M
中科院分区：
文献类型：
--
作者：
Jouen AL;Lancheros M;Laganaro M
在过去的15年里，使用脑电图（EEG）来研究显性语言的产生已经大大增加，而诱发电位（ERPs）在反应开始时的对齐已经成为一种非常有用的方法来瞄准语言产生的“最新”阶段。然而，响应锁定的erp提出了一个方法上的问题：对齐点应该放在哪个事件上？响应锁定的erp通常与声音（声学）开始一致，尽管众所周知，发音运动可能在声音开始前100毫秒开始，并且这种“发音开始到声学开始间隔”（AAI）取决于音素属性。鉴于之前报道的测量AAI的困难，本研究的目的是确定AAI是否可以用脑电图显微状态可靠地检测。用高密度脑电图记录4个不同起音辅音的单音节假词延迟语音生成过程。虽然声音反应的开始取决于起音辅音，但响应锁定的时空脑电图分析显示，不同起音辅音的相同微状态序列具有明显的非同步性。一个特定的微状态，最新观察到的erp锁定在声音开始，表现出更长时间的音素持续时间更长，更长的声音反应开始。越来越多的证据似乎证实，这种微观状态可能与运动执行的关节性开始有关：其头皮地形与先前与肌肉活动相关的地形相对应，并且源定位强调了运动区域的参与。最后，在单次试验中对这种微状态持续时间的分析进一步符合先前研究中报道的特定音素的AAI间隔。因此，这些结果表明，特定的erp微观状态是关节发病和AAI的可靠指标。本文的在线版本（10.1007/s10548-020-00803-3）包含补充内容，仅供授权用户使用。
The use of electroencephalography (EEG) to study overt speech production has increased substantially in the past 15 years and the alignment of evoked potential (ERPs) on the response onset has become an extremely useful method to target “latest” stages of speech production. Yet, response-locked ERPs raise a methodological issue: on which event should the point of alignment be placed? Response-locked ERPs are usually aligned to the vocal (acoustic) onset, although it is well known that articulatory movements may start up to a hundred milliseconds prior to the acoustic onset and that this “articulatory onset to acoustic onset interval” (AAI) depends on the phoneme properties. Given the previously reported difficulties to measure the AAI, the purpose of this study was to determine if the AAI could be reliably detected with EEG-microstates. High-density EEG was recorded during delayed speech production of monosyllabic pseudowords with four different onset consonants. Whereas the acoustic response onsets varied depending on the onset consonant, the response-locked spatiotemporal EEG analysis revealed a clear asynchrony of the same sequence of microstates across onset consonants. A specific microstate, the latest observed in the ERPs locked to the vocal onset, presented longer duration for phonemes with longer acoustic response onsets. Converging evidences seemed to confirm that this microstate may be related to the articulatory onset of motor execution: its scalp topography corresponded to those previously associated with muscle activity and source localization highlighted the involvement of motor areas. Finally, the analyses on the duration of such microstate in single trials further fit with the AAI intervals for specific phonemes reported in previous studies. These results thus suggest that a particular ERP-microstate is a reliable index of articulation onset and of the AAI. The online version of this article (10.1007/s10548-020-00803-3) contains supplementary material, which is available to authorized users.
登录
查看更多内容
影响因子：
3.8
作者：
Ganushchak LY;Christoffels IK;Schiller NO
通讯作者：
Schiller NO
影响因子：
2.7
作者：
Laganaro, Marina;Perret, Cyril
通讯作者：
Perret, Cyril
影响因子：
2.5
作者：
Lancheros, M.;Jouen, A-L.;Laganaro, M.
通讯作者：
Laganaro, M.
影响因子：
3.8
作者：
Bürki A;Laganaro M
通讯作者：
Laganaro M
影响因子：
5.7
作者：
McMenamin BW;Shackman AJ;Greischar LL;Davidson RJ
通讯作者：
Davidson RJ