Functional neuroanatomical networks associated with expertise in motor imagery
Functional neuroanatomical networks associated with expertise in motor imagery
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DOI：
10.1016/j.neuroimage.2008.03.042
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发表时间：
2008-07-15
期刊：
影响因子：
5.7
通讯作者：
Doyon, Julien
中科院分区：
文献类型：
--
作者：
Guillot, Aymeric;Collet, Christian;Doyon, Julien
尽管大量的行为研究提供了证据表明单个运动图像（MI）能力之间存在广泛的差异，但就功能性神经解剖网络而言，鲜为人知，这些网络可以解散具有良好MI能力与较差的MI能力的人。因此，我们首次通过功能磁共振成像（fMRI）进行了比较，在物理执行和一系列手指运动的MI期间，在13个熟练的熟练和15个非熟练成像器中的大脑激活模式。使用良好的问卷和计时措施评估了MI能力的差异，以及基于受试者的周围性神经系统的周围反应的新指数。如预期的那样，良好的成像师都激活了下顶叶和上顶叶，以及与运动相关的区域，包括侧向前和内侧前皮层，小脑和果肉。组间比较表明，好成像师更多地激活了顶端和腹侧前部门，这些区域已知在心理图像的产生中起着至关重要的作用。相比之下，贫穷的成像师招募了小脑，眶额和后扣带回皮质。与运动序列学习文献和Doyon和Ungerleider运动学习模型的发现一致[Doyon，J。，Ungerleider，L。G.，2002。运动技能学习功能性解剖学。 In: Squire, L. R., Schacter, D. L. (Eds.), Neuropsychology of memory, Guilford Press, pp. 225-238], our results demonstrate that compared to skilled imagers, poor imagers not only need to recruit the cortico-striatal system, but to compensate with the cortico-cerebellar system during MI of sequential movements. （c）2008 Elsevier Inc.保留所有权利。
Although numerous behavioural studies provide evidence that there exist wide differences within individual motor imagery (MI) abilities, little is known with regards to the functional neuroanatomical networks that dissociate someone with good versus poor MI capacities. For the first time, we thus compared, through functional magnetic resonance imaging (fMRI), the pattern of cerebral activations in 13 skilled and 15 unskilled imagers during both physical execution and MI of a sequence of finger movements. Differences in MI abilities were assessed using well-established questionnaire and chronometric measures, as well as a new index based upon the subject's peripheral responses from the autonomic nervous system. As expected, both good and poor imagers activated the inferior and superior parietal lobules, as well as motor-related regions including the lateral and medial premotor cortex, the cerebellum and putamen. Inter-group comparisons revealed that good imagers activated more the parietal and ventrolateral premotor regions, which are known to play a critical role in the generation of mental images. By contrast, poor imagers recruited the cerebellum, orbito-frontal and posterior cingulate cortices. Consistent with findings from the motor sequence learning literature and Doyon and Ungerleider's model of motor learning [Doyon, J., Ungerleider, L. G., 2002. Functional anatomy of motor skill learning. In: Squire, L. R., Schacter, D. L. (Eds.), Neuropsychology of memory, Guilford Press, pp. 225-238], our results demonstrate that compared to skilled imagers, poor imagers not only need to recruit the cortico-striatal system, but to compensate with the cortico-cerebellar system during MI of sequential movements. (c) 2008 Elsevier Inc. All rights reserved.