Similar somatotopy for active and passive digit representation in primary somatosensory cortex.
Similar somatotopy for active and passive digit representation in primary somatosensory cortex.
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DOI：
10.1002/hbm.26298
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发表时间：
2023-06-15
影响因子：
4.8
通讯作者：
Makin, Tamar R.
中科院分区：
文献类型：
--
作者：
Sanders, Zeena-Britt;Dempsey-Jones, Harriet;Wesselink, Daan B.;Edmondson, Laura R.;Puckett, Alexander M.;Saal, Hannes P.;Makin, Tamar R.
关键词：
科学家传统上使用被动刺激来检查初级躯体感觉皮层（SI）的组织。然而，由于身体感觉和运动系统之间的密切，双向的关系，涉及自由运动的主动范式可能会发现替代SI代表图案。在这里，我们使用7特斯拉的功能磁共振成像比较的标志性功能的SI数字表示之间的主动和被动的任务，这是不匹配的任务或刺激属性。数字地图的空间位置，躯体位置组织和数字间表征结构在任务之间基本一致，表明表征一致性。我们还观察到一些任务差异。主动任务产生更高的单变量活动和多变量表征信息内容（数字间距离）。被动任务显示出对数字的选择性大于对相邻数字的选择性的趋势。我们的研究结果强调，虽然SI功能组织的总体特征是任务不变的，但重要的是还要考虑运动对数字表征的贡献。在主动（运动）和被动（静止刺激）任务中，研究了初级体感皮层中手的表征。这些任务产生的表征在大脑中的位置，躯体组织和手指间表征结构方面通常是一致的。一些任务的差异进行了观察，包括增加大脑活动和增加多变量的代表性内容的主动任务。
Scientists traditionally use passive stimulation to examine the organisation of primary somatosensory cortex (SI). However, given the close, bidirectional relationship between the somatosensory and motor systems, active paradigms involving free movement may uncover alternative SI representational motifs. Here, we used 7 Tesla functional magnetic resonance imaging to compare hallmark features of SI digit representation between active and passive tasks which were unmatched on task or stimulus properties. The spatial location of digit maps, somatotopic organisation, and inter‐digit representational structure were largely consistent between tasks, indicating representational consistency. We also observed some task differences. The active task produced higher univariate activity and multivariate representational information content (inter‐digit distances). The passive task showed a trend towards greater selectivity for digits versus their neighbours. Our findings highlight that, while the gross features of SI functional organisation are task invariant, it is important to also consider motor contributions to digit representation. Representation of the hand in primary somatosensory cortex was examined during active (movement) and passive (stationary stimulation) tasks. The representations these tasks produced were generally consistent in terms of location in the brain, somatotopic organisation, and inter‐digit representational structure. Some task differences were observed, including increased brain activity and increased multivariate representational content for the active task.
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影响因子：
16.2
作者：
Goense J;Merkle H;Logothetis NK
通讯作者：
Logothetis NK
影响因子：
4.3
作者：
Chouvardas, V. G.;Miliou, A. N.;Hatalis, M. K.
通讯作者：
Hatalis, M. K.
影响因子：
2
作者：
Eimer, M;Cockburn, D;Driver, J
通讯作者：
Driver, J
影响因子：
2.5
作者：
Hickmott, PW;Merzenich, MM
通讯作者：
Merzenich, MM
DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
BENJAMINI, Y;HOCHBERG, Y
通讯作者：
HOCHBERG, Y