Neural effects of cognitive control load on auditory selective attention.
Neural effects of cognitive control load on auditory selective attention.
复制标题
DOI：
10.1016/j.neuropsychologia.2014.06.009
复制
发表时间：
2014-08
期刊：
影响因子：
2.6
通讯作者：
Desai, Anjali
中科院分区：
文献类型：
--
作者：
Sabri, Merav;Humphries, Colin;Verber, Matthew;Liebenthal, Einat;Binder, Jeffrey R.;Mangalathu, Jain;Desai, Anjali
工作记忆是否以及如何干扰或改变听觉选择性注意尚不清楚。我们比较了同时事件相关电位（ERP）和功能性磁共振成像（fMRI）的反应与任务无关的声音在高和低的工作记忆负荷的双耳分听范式。参与者在一只耳朵（Attend ear）中执行n-back任务（1-back，2-back），同时忽略另一只耳朵（Ignore ear）中与任务无关的语音。工作记忆负荷对选择性注意的影响在130-210毫秒，较高的负荷导致听觉皮层中定位器定义的区域更大的无关音节相关激活。记忆负荷和不相关信息的存在之间的相互作用，揭示了更强的激活主要是在额叶和顶叶地区，由于存在的不相关信息，在较高的记忆负荷。ERP和fMRI数据的联合独立成分分析显示，ERP成分在N1时间范围内与上级颞回和内侧前额叶皮层的活动有关。这些结果表明，工作记忆负荷和听觉选择性注意之间存在动态关系，与注意负荷模型和记忆和注意共同神经资源的观点一致。
Whether and how working memory disrupts or alters auditory selective attention is unclear. We compared simultaneous event-related potentials (ERP) and functional magnetic resonance imaging (fMRI) responses associated with task-irrelevant sounds across high and low working memory load in a dichotic-listening paradigm. Participants performed n-back tasks (1-back, 2-back) in one ear (Attend ear) while ignoring task-irrelevant speech sounds in the other ear (Ignore ear). The effects of working memory load on selective attention were observed at 130-210 msec, with higher load resulting in greater irrelevant syllable-related activation in localizer-defined regions in auditory cortex. The interaction between memory load and presence of irrelevant information revealed stronger activations primarily in frontal and parietal areas due to presence of irrelevant information in the higher memory load. Joint independent component analysis of ERP and fMRI data revealed that the ERP component in the N1 time-range is associated with activity in superior temporal gyrus and medial prefrontal cortex. These results demonstrate a dynamic relationship between working memory load and auditory selective attention, in agreement with the load model of attention and the idea of common neural resources for memory and attention.
登录
查看更多内容
影响因子：
5.7
作者：
Bidet-Caulet, Aurelie;Mikyska, Constanze;Knight, Robert T.
通讯作者：
Knight, Robert T.
影响因子：
2.9
作者：
Feldman H;Friston KJ
通讯作者：
Friston KJ
DOI：
10.1073/pnas.0505454102
发表时间：
2005-11-08
影响因子：
11.1
作者：
Kim, SY;Kim, MS;Chun, MM
通讯作者：
Chun, MM
影响因子：
1.7
作者：
Ahmed, Lubna;de Fockert, Jan W.
通讯作者：
de Fockert, Jan W.
影响因子：
3.5
作者：
Lavie, N;De Fockert, J
通讯作者：
De Fockert, J