Krüger Britta, Bischoff Matthias, Blecker Carlo, Langhanns Christine, Kindermann Stefan, Sauerbier Isabell, Reiser Mathias, Stark Rudolf, Munzert Jörn, Pilgramm Sebastian
Institute for Sports Science, Justus Liebig University Giessen, Germany.
Institute of Sport and Exercise Sciences, University of Muenster, Germany.
Neuroimage. 2014 Oct 15;100:39-50. doi: 10.1016/j.neuroimage.2014.05.074. Epub 2014 Jun 5.
This study investigated whether activation within areas belonging to the action observation and imitation network reveals a linear relation to the subsequent accuracy of imitating a bimanual rhythmic movement measured via a motion capturing system. 20 participants were scanned with functional magnetic resonance imaging (fMRI) when asked to imitate observed bimanual movements either concurrently versus with a delay (2s) or simply to observe the movements without imitation. Results showed that action observation relates to activation within classic mirror-related areas. Activation patterns were more widespread when participants were asked to imitate the movement. During observation with concurrent imitation, activation in the left inferior parietal lobe (IPL) was associated negatively with imitation accuracy. During observation in the delayed imitation condition, higher subsequent imitation accuracy was coupled with higher activation in the right superior parietal lobe (SPL) and the left parietal operculum (POp). During the delayed imitation itself, a negative association between imitation accuracy and brain activation was revealed in the right ventral premotor cortex (vPMC). We conclude that the IPL is involved in online comparison and visuospatial attention processes during imitation, the SPL provides a kinesthetic blueprint during movement observation, the POp preserves body identity, and the vPMC recruits motor representations--especially when no concurrent visual guidance is possible.
本研究调查了属于动作观察与模仿网络的区域内的激活是否与随后通过动作捕捉系统测量的模仿双手节律性运动的准确性呈线性关系。20名参与者在被要求模仿观察到的双手运动时，分别在同时进行、延迟2秒进行或仅观察运动而不进行模仿的情况下接受了功能磁共振成像（fMRI）扫描。结果表明，动作观察与经典镜像相关区域内的激活有关。当参与者被要求模仿运动时，激活模式更为广泛。在同时模仿观察期间，左下顶叶（IPL）的激活与模仿准确性呈负相关。在延迟模仿条件下的观察期间，较高的后续模仿准确性与右上顶叶（SPL）和左顶叶岛盖（POp）的较高激活相关。在延迟模仿本身期间，在右腹侧前运动皮层（vPMC）中发现模仿准确性与脑激活之间存在负相关。我们得出结论，IPL在模仿过程中参与在线比较和视觉空间注意过程，SPL在运动观察期间提供动觉蓝图，POp保留身体特征，而vPMC募集运动表征——尤其是在无法同时进行视觉引导的情况下。
