Theta Oscillations and Source Connectivity During Complex Audiovisual Object Encoding in Working Memory.
Theta Oscillations and Source Connectivity During Complex Audiovisual Object Encoding in Working Memory.
复制标题
工作记忆中复杂视听对象编码过程中的 Theta 振荡和源连接
DOI：
10.3389/fnhum.2021.614950
复制
发表时间：
2021
影响因子：
2.9
通讯作者：
Fang P
中科院分区：
文献类型：
--
作者：
Xie Y;Li Y;Duan H;Xu X;Zhang W;Fang P
工作记忆是一种有限容量的记忆系统，涉及信息的短期存储和处理。工作记忆的神经科学研究主要集中在单一感觉模式（如视觉和听觉）的项目编码过程中神经振荡的重要作用。然而，对工作记忆中多感觉编码过程中神经振荡特征的研究却很少。本研究研究了受试者在工作记忆任务中编码复杂视听对象时，头皮电极神经信号的振荡特征，并绘制了脑功能连接图。实验结果表明，θ波振荡（4-8 Hz）非常突出，分布在多个皮质区域，包括前额叶（如额上回）、顶叶（如楔前叶）、颞叶（如颞下回）和枕叶（如楔叶）皮质。此外，与单模态对象编码相比，这些皮层区域在θ振荡频率上的神经连通性显著。这些结果表明，局部振荡和通过theta活动的区域间连通性在视听对象编码过程中发挥了重要作用，并可能有助于多感官项目工作记忆痕迹的形成。
Working memory is a limited capacity memory system that involves the short-term storage and processing of information. Neuroscientific studies of working memory have mostly focused on the essential roles of neural oscillations during item encoding from single sensory modalities (e.g., visual and auditory). However, the characteristics of neural oscillations during multisensory encoding in working memory are rarely studied. Our study investigated the oscillation characteristics of neural signals in scalp electrodes and mapped functional brain connectivity while participants encoded complex audiovisual objects in a working memory task. Experimental results showed that theta oscillations (4–8 Hz) were prominent and topographically distributed across multiple cortical regions, including prefrontal (e.g., superior frontal gyrus), parietal (e.g., precuneus), temporal (e.g., inferior temporal gyrus), and occipital (e.g., cuneus) cortices. Furthermore, neural connectivity at the theta oscillation frequency was significant in these cortical regions during audiovisual object encoding compared with single modality object encoding. These results suggest that local oscillations and interregional connectivity via theta activity play an important role during audiovisual object encoding and may contribute to the formation of working memory traces from multisensory items.
登录
查看更多内容
DOI：
10.1073/pnas.0504136102
发表时间：
2005-07-05
影响因子：
11.1
作者：
Fox, MD;Snyder, AZ;Raichle, ME
通讯作者：
Raichle, ME
影响因子：
2.9
作者：
Constantinidis, Christos;Procyk, Emmanuel
通讯作者：
Procyk, Emmanuel
影响因子：
4.8
作者：
Casado-Aranda, Luis-Alberto;Van der Laan, Laura Nynke;Sanchez-Fernandez, Juan
通讯作者：
Sanchez-Fernandez, Juan
影响因子：
24.8
作者：
D'Esposito M;Postle BR
通讯作者：
Postle BR
影响因子：
3.7
作者：
Cohen, Jessica R.;Sreenivasan, Kartik K.;D'Esposito, Mark
通讯作者：
D'Esposito, Mark