Reactivation of physical motor information in the memory of action events
Reactivation of physical motor information in the memory of action events
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DOI：
10.1016/j.brainres.2006.05.033
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发表时间：
2006-07-26
期刊：
影响因子：
2.9
通讯作者：
Tonoike, Mitsuo
中科院分区：
文献类型：
--
作者：
Masumoto, Kouhei;Yamaguchi, Masahiko;Tonoike, Mitsuo
当试图记住动作句时（例如，打开一把伞），执行句子的动作（制定的编码）比简单地记住句子（口头编码）会产生更好的记忆表现。这种记忆增强被称为制定效应。脑磁图（MEG）被用来阐明是否制定效果是由于物理运动信息或是否运动表征是制定效果的关键因素。物理运动信息涉及初级运动皮层，代表运动的速度，形式和运动感，而运动表征则表示语义和概念信息，如运动公式，运动想法和运动意象，这些信息特别与顶叶皮层有关。我们测量了运动区和顶叶皮层的活动在识别测试和比较活动在识别与制定和口头编码条件。实验结果表明，采用设定编码的识别效果更好。脑磁图结果显示，在编码条件下，所有被试的左侧初级运动皮层都被激活，而在言语编码条件下，只有一名被试出现了这种激活。这些活动观察识别刺激发作后150和250毫秒之间，并被传输到左顶叶皮层。此外，右顶叶皮层的活动后颁布的编码大于那些以下的口头编码，和活动出现在600-700 ms后的再认刺激。这些结果表明，制定效果发生的物理运动信息的重新激活，这些信息促进活动有关的运动表征。
When attempting to memorize action sentences (e.g., open an umbrella), performing the action of the sentence (enacted encoding) results in better memory performance than simply memorizing the sentences (verbal encoding). This memory enhancement is called the enactment effect. Magnetoencephalography (MEG) was used to elucidate whether the enactment effect is due to physical motor information or whether movement representation is the critical factor in the enactment effect. Physical motor information, which is implicated in the primary motor cortex, represents the speed, form, and kinematic sense of a movement, while movement representation indicates semantic and conceptual information such as movement formulae, movement ideas, and movement imagery, which are especially associated with the parietal cortex. We measured activities within the motor region and parietal cortex during a recognition test and compared activities during recognition with enacted and verbal encoding condition. The results showed that recognition performance was better for enacted encoding. The MEG data indicated that the left primary motor cortex with enacted encoding condition was activated in all subjects, though with verbal encoding condition, this activation appeared in only one subject. These activities were observed between 150 and 250 ms after recognition stimuli onset and were transmitted into the left parietal cortex. Moreover, activities in the right parietal cortex following enacted encoding were greater than those following verbal encoding, and the activities appeared 600-700 ms after onset of the recognition stimuli. These results suggest that the enactment effect occurs by the reactivation of the physical motor information and that this information facilitates activities related to movement representation.