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首页> 外文期刊>The European Journal of Neuroscience >Attenuated human auditory middle latency response and evoked 40-Hz response to self-initiated sounds.
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Attenuated human auditory middle latency response and evoked 40-Hz response to self-initiated sounds.

机译：减轻了人类听觉中潜伏期的反应，并引起了对自发声音的40 Hz反应。

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摘要

For several modalities, it has been shown that the processing of sensory information generated by our own actions is attenuated relative to the processing of sensory information of externally generated stimuli. It has been proposed that the underlying mechanism builds predictions about the forthcoming sensory input and forwards them to the respective sensory processing levels. The present study investigated whether early auditory processing is suppressed by the top-down influences of such an internal forward model mechanism. To this end, we compared auditory middle latency responses (MLRs) and evoked 40-Hz responses elicited by self-initiated sounds with those elicited by externally initiated but otherwise identical sounds. In the self-initiated condition, the amplitudes of the Pa (27-33 ms relative to sound onset) and Nb (40-46 ms) components of the MLRs were significantly attenuated when compared to the responses elicited by click sounds presented in the externally initiated condition. Similarly, theevoked activity in the 40-Hz and adjacent frequency bands was attenuated. Considering that previous research revealed subcortical and auditory cortex contributions to MLRs and 40-Hz responses, our results support the existence of auditory suppression effects with self-initiated sounds on temporally and structurally early auditory processing levels. This attenuation in the processing of self-initiated sounds most probably contributes to the optimal processing of concurrent external acoustic events.
机译：对于几种方式，已经表明，相对于外部产生的刺激的感觉信息的处理，由我们自己的动作产生的感觉信息的处理被削弱了。已经提出，基本机制建立关于即将到来的感觉输入的预测，并将其转发到相应的感觉处理水平。本研究调查了这种内部前向模型机制的自上而下的影响是否抑制了早期听觉处理。为此，我们将听觉中潜伏期响应（MLR）和由自发声音引起的40 Hz响应与由外部发声但在其他方面相同的声音引起的响应进行了比较。在自启动条件下，与外部出现的喀嗒声所引起的响应相比，MLR的Pa（相对于声音发作的27-33 ms）和Nb（40-46 ms）分量的幅度显着衰减。起始条件。同样，在40 Hz和相邻频带中引起的活动减弱。考虑到以前的研究揭示了皮质下和听觉皮层对MLR和40 Hz响应的贡献，我们的结果支持了在时间和结构上早期听觉处理水平上具有自发声音的听觉抑制效应的存在。在处理自发声音时，这种衰减很可能有助于同时处理外部声音事件的最佳处理。

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