The relationship between the temporal structure of magnetoencephalography recorded brain activity and capacity to form discrete auditory representations.
The relationship between the temporal structure of magnetoencephalography recorded brain activity and capacity to form discrete auditory representations.
复制标题
脑磁图记录的大脑活动的时间结构与形成离散听觉表征的能力之间的关系。
DOI：
10.1111/ejn.14289
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Allen C
中科院分区：
文献类型：
--
作者：
Allen C
大脑振荡活动的一个功能可能是使活动相对于阈值电位一致，并且这样做为代表性神经元组件的形成提供了有限的机会。这种低级函数可以跨频段应用，并可能影响体验的时间动态。为了测试这些可能性，开发了一种脑磁描记术方案，其中相对于大脑振荡活动来评估随着时间的推移形成离散听觉表征的能力。进行了三组预先注册的分析。首先，形成表征的能力与听觉皮层局部活动的发生率和持续时间相关。其次，大脑振荡受到广泛频率范围内的刺激的影响。最后，一系列伽马（γ）带事件预测了成功的离散表示，之前的研究表明在阿尔法（α）范围内存在类似的与个体相关的差异。总之，这些发现表明，皮层振荡的低级功能可能适用于一系列频带，它周期性地设定表征神经元组件可以显现、限制并从而影响体验流的条件。
A function of oscillatory brain activity may be to align activity relative to threshold potentials and in doing so provide limited opportunities for representational neuronal assemblies to form. This low‐level function could apply across frequency bands and potentially affect the temporal dynamics of experience. To test these possibilities, a magnetoencephalography protocol was developed where capacity to form discrete auditory representations over time was assessed relative to oscillatory brain activity. Three sets of preregistered analyses were conducted. First, the capacity to form representations correlated with the prevalence and durations of activity localised to the auditory cortex. Second, brain oscillations became entrained to stimuli over a broad range of frequencies. Finally, a sequence of gamma (γ) band events predicted successful discrete representation, where previous research had indicated similar individuation‐related differences within the alpha (α) range. Together, these findings indicate that a low‐level function of cortical oscillations, which may apply across a range of frequency bands, is periodically to set conditions in which representational neuronal assemblies can manifest, limiting and so affecting the flow of experience.