A frontoparietal network for spatial attention reorienting in the auditory domain: A human fMRI/MEG study of functional and temporal dynamics
A frontoparietal network for spatial attention reorienting in the auditory domain: A human fMRI/MEG study of functional and temporal dynamics
复制标题
DOI：
10.1093/cercor/bhm145
复制
发表时间：
2008-05-01
期刊：
影响因子：
3.7
通讯作者：
Romani, G. L.
中科院分区：
文献类型：
--
作者：
Brunetti, M.;Della Penna, S.;Romani, G. L.
几项研究已经确定了一个超模态网络的关键重新定位的注意力对刺激在新的位置，其中涉及右颞顶交界处和下额叶区。本研究利用功能磁共振成像（fMRI）、脑磁图（MEG）研究了：1）空间变化的声音位置引起注意重定向的脑回路：2）与同一半野内声音位置的规律性变化、不同半野间声音位置的变化以及方位平面上不同位置随机出现的声音有关的脑回路;（3）利用功能磁共振成像和脑磁图的互补特性，对所观察到的皮层区域进行功能性时间动力学研究。功能磁共振成像结果表明3个不同的角色：颞上平面出现调制的变化的声音的位置;顶叶下小叶调制的跨经络效应;和下额叶皮层从事的运动反应的抑制。MEG数据有助于阐明这个网络的时间动态，提供高分辨率的时间序列来测量由注意力重新定向操纵的神经激活的延迟。
Several studies have identified a supramodal network critical to the reorienting of attention toward stimuli at novel locations and which involves the right temporoparietal junction and the inferior frontal areas. The present functional magnetic resonance imaging (fMRI)\magnetoencephalography (MEG) study investigates: 1) the cerebral circuit underlying attentional reorienting to spatially varying sound locations; 2) the circuit related to the regular change of sound location in the same hemifield, the change of sound location across hemifields, or sounds presented randomly at different locations on the azimuth plane; 3) functional temporal dynamics of the observed cortical areas exploiting the complementary characteristics of the fMRI and MEG paradigms. fMRI results suggest 3 distinct roles: the supratemporal plane appears modulated by variations of sound location; the inferior parietal lobule is modulated by the cross-meridian effect; and the inferior frontal cortex is engaged by the inhibition of a motor response. MEG data help to elucidate the temporal dynamics of this network by providing high-resolution time series with which to measure latency of neural activation manipulated by the reorienting of attention.