Experience-dependent modulation of alpha and beta during action observation and motor imagery.
Experience-dependent modulation of alpha and beta during action observation and motor imagery.
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DOI：
10.1186/s12868-017-0349-0
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发表时间：
2017-03-06
期刊：
影响因子：
2.4
通讯作者：
DeSouza JFX
中科院分区：
文献类型：
--
作者：
Di Nota PM;Chartrand JM;Levkov GR;Montefusco-Siegmund R;DeSouza JFX
研究促进动作观察（AO）和动觉运动想象（KMI）的神经网络的EEG研究表明，相对于休息，α（8-12 Hz）和β（13-30 Hz）频段的功率降低或去激活，反映了任务相关区域的有效激活。这些网络的功能调制，通过专门知识在舞蹈已经建立了使用功能磁共振成像，与更大的激活专家在AO。虽然有证据表明，在AO的舞蹈α功率的经验依赖的可塑性，熟悉的影响，在AO的β功率，和α和β活动在KMI期间，仍然不清楚。本研究的目的是测量在芭蕾舞者、其他类型的舞蹈者和非舞蹈者中，熟悉度对（1）简短芭蕾舞序列的AO、（2）同一序列的KMI和（3）非舞蹈动作的KMI期间的置信度和EEG活动的影响。芭蕾舞演员非常熟悉的实验刺激的类型表现出较高的个人α峰频率（iAPF），更大的α desertification，更大的任务相关的β功率在AO，以及更快的iAPF在KMI的非舞蹈动作。虽然在舞蹈或非舞蹈动作的KMI期间没有观察到α或β功率的组间差异，但所有参与者相对于基线均表现出显着的去同步化，并且相对于非舞蹈KMI，舞蹈KMI期间进一步去同步化，表明认知负荷更大。这些发现证实并扩展了在舞蹈和KMI AO期间α和β活动的经验依赖性可塑性的证据。我们还提供了新的证据，调制的iAPF是更快时，调整到特定的电机剧目的观察者。通过考虑这些频带在同一任务（AO）的多个功能角色，我们已经解开了复杂的贡献熟悉和专业知识的α desertification调解熟悉的芭蕾舞演员之间的任务参与，并反映任务难度在不熟悉的非舞蹈科目，分别。相对于日常非舞蹈动作，复杂舞蹈序列的KMI招募了更多的认知资源，这表明它可能是驱动动作网络神经可塑性的更强大的工具，特别是在老年人和运动障碍患者中。
EEG studies investigating the neural networks that facilitate action observation (AO) and kinaesthetic motor imagery (KMI) have shown reduced, or desynchronized, power in the alpha (8–12 Hz) and beta (13–30 Hz) frequency bands relative to rest, reflecting efficient activation of task-relevant areas. Functional modulation of these networks through expertise in dance has been established using fMRI, with greater activation among experts during AO. While there is evidence for experience-dependent plasticity of alpha power during AO of dance, the influence of familiarity on beta power during AO, and alpha and beta activity during KMI, remain unclear. The purpose of the present study was to measure the impact of familiarity on confidence ratings and EEG activity during (1) AO of a brief ballet sequence, (2) KMI of this same sequence, and (3) KMI of non-dance movements among ballet dancers, dancers from other genres, and non-dancers. Ballet dancers highly familiar with the genre of the experimental stimulus demonstrated higher individual alpha peak frequency (iAPF), greater alpha desynchronization, and greater task-related beta power during AO, as well as faster iAPF during KMI of non-dance movements. While no between-group differences in alpha or beta power were observed during KMI of dance or non-dance movements, all participants showed significant desynchronization relative to baseline, and further desynchronization during dance KMI relative to non-dance KMI indicative of greater cognitive load. These findings confirm and extend evidence for experience-dependent plasticity of alpha and beta activity during AO of dance and KMI. We also provide novel evidence for modulation of iAPF that is faster when tuned to the specific motor repertoire of the observer. By considering the multiple functional roles of these frequency bands during the same task (AO), we have disentangled the compounded contribution of familiarity and expertise to alpha desynchronization for mediating task engagement among familiar ballet dancers and reflecting task difficulty among unfamiliar non-dance subjects, respectively. That KMI of a complex dance sequence relative to everyday, non-dance movements recruits greater cognitive resources suggests it may be a more powerful tool in driving neural plasticity of action networks, especially among the elderly and those with movement disorders.