Determination of activation areas in the human auditory cortex by means of synthetic aperture magnetometry
Determination of activation areas in the human auditory cortex by means of synthetic aperture magnetometry
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DOI：
10.1016/s1053-8119(03)00403-8
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发表时间：
2003-10-01
期刊：
影响因子：
5.7
通讯作者：
Pantev, C
中科院分区：
文献类型：
--
作者：
Herdman, AT;Wollbrink, A;Pantev, C
在这项研究中，我们应用合成孔径磁测量（SAM）调查与磁记录的瞬态和稳态听觉诱发反应相关的活跃皮层区域。对于瞬态诱发反应，SAM图像显示激活体积的皮质组织内的侧面的上级颞平面。稳态反应的皮层激活量位于更中间比瞬态诱发反应。此外，SAM还揭示了瞬态和稳态诱发反应之间的激活区域的小重叠，这在使用等效电流偶极子（ECD）源建模时尚未得到证明。SAM和ECD分析的源波形显示出可比的时间信息。这项研究的结果表明，SAM是一种有用的技术，用于成像参与处理知觉信息的皮层结构。(C)2003年爱思唯尔公司All rights reserved.
In this study we applied synthetic aperture magnetometry (SAM) to investigate active cortical areas associated with magnetically recorded transient and steady-state auditory evoked responses. For transient evoked responses, SAM images reveal an activated volume of cortical tissue within the lateral aspect of the superior temporal plane. The volume of cortical activation for steady-state responses was located more medially than that for transient evoked responses. Additionally, SAM also reveals a small overlap of activated areas between transient and steady-state evoked responses, which has not be demonstrated when using equivalent current dipole (ECD) source modeling. Source waveforms from SAM and ECD analyses show comparable temporal information. Results from this study suggest that SAM is a useful technique for imaging cortical structures involved in processing perceptual information. (C) 2003 Elsevier Inc. All rights reserved.