Kranczioch Cornelia, Mathews Simon, Dean Phil J A, Sterr Annette
Biomagnetic Center, Department of Neurology, University Hospital Jena, Jena, Germany.
Hum Brain Mapp. 2009 Oct;30(10):3275-86. doi: 10.1002/hbm.20748.
The neural simulation theory assumes that motor imagery and motor execution draw on a shared set of mechanisms underlying motor cognition. Evidence is accumulating that motor imagery and motor execution have many common features. The extent of the similarity and whether it spreads into the preparation phase is however unclear. This study used electroencephalographic recordings to compare the effects of providing advance information about upcoming movements on preparatory processing in a motor imagery and execution paradigm. Event-related potential data were recorded in a priming task where participants were cued to perform simple or complex finger movements. We hypothesized that a high degree of functional similarity of motor imagery and motor execution should be reflected in similar alterations of lateralized preparatory activity. Lateralized preparatory activity was indeed very similar, showing both motor-related (lateralized readiness potential, LRP) and cognitive components (anterior directing-attention negativity or ADAN, late directing-attention positivity or LDAP). Dipole analysis revealed that LRP, ADAN, and LDAP sources were very comparable for motor imagination and execution. Results generally support the idea of common underlying functional networks subserving both the preparation for execution and imagery of movements. They also provide a broader context for this notion by revealing similarities in cognitive components associated with the movement tasks.
神经模拟理论假定，运动想象和运动执行利用了运动认知背后的一组共同机制。越来越多的证据表明，运动想象和运动执行具有许多共同特征。然而，相似程度以及这种相似性是否扩展到准备阶段尚不清楚。本研究使用脑电图记录，在运动想象和执行范式中，比较提供即将进行的运动的预先信息对准备过程的影响。在一个启动任务中记录事件相关电位数据，在该任务中，参与者被提示执行简单或复杂的手指运动。我们假设，运动想象和运动执行的高度功能相似性应反映在侧化准备活动的类似变化中。侧化准备活动确实非常相似，显示出与运动相关的（侧化准备电位，LRP）和认知成分（前向注意负波或ADAN，后向注意正波或LDAP）。偶极子分析表明，LRP、ADAN和LDAP源在运动想象和执行方面非常可比。结果总体上支持了这样一种观点，即存在共同的潜在功能网络，为运动的执行准备和想象提供支持。它们还通过揭示与运动任务相关的认知成分中的相似性，为这一概念提供了更广泛的背景。
