Activation of somatosensory cortical areas varies with attentional state:: an fMRI study
Activation of somatosensory cortical areas varies with attentional state:: an fMRI study
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DOI：
10.1016/s0166-4328(02)00145-6
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发表时间：
2002-09-20
影响因子：
2.7
通讯作者：
Titievskaja, I
中科院分区：
文献类型：
--
作者：
Hämäläinen, H;Hiltunen, J;Titievskaja, I
在以前的研究中，SI和SII区在躯体感觉系统中的不同作用相对较少受到关注。在目前的研究中，功能磁共振成像被用来确定这些区域的激活作为注意力调节(注意与不注意手指刺激)的函数的可能变化。结果表明，注意引起的区域变化在SII比SI更大，主要是激活区域的扩大。在SII观察到的新的、新出现的激活(在无人参与的情况下不存在)的数量比在SI观察到的多。这些不同的注意效应表明，SII区可能在更复杂的触觉功能中发挥作用，例如触觉工作记忆机制。(C)2002 Elsevier Science B.V.保留所有权利。
The differing roles of SI and SII areas in the somatosensory system have received relatively little interest in previous research. In the present study fMRI was applied to determine possible changes in activations of these areas as a function of attentional modulation (attending vs. not attending to the stimulation of a finger). The results showed that attention induced larger regional changes, mostly enlargements of activated areas, at SII than at SI. The number of instances where new, emerging activations, not present in the non-attend condition, were observed was larger at SII than at SI. These differential attentional effects indicate that SII areas may have a role in more complex tactile functions such as tactile working memory mechanisms. (C) 2002 Elsevier Science B.V. All rights reserved.