Univ Lyon, Université Claude Bernard Lyon 1, Laboratoire Interuniversitaire de Biologie de la Motricité, LIBM, Villeurbanne, France.
Institut Universitaire de France, 1 Rue Descartes 75005 Paris, France.
Cereb Cortex. 2023 Nov 27;33(23):11431-11445. doi: 10.1093/cercor/bhad379.
Motor imagery can, similarly to physical practice, improve motor performance through experience-based plasticity. Using magnetoencephalography, we investigated changes in brain activity associated with offline consolidation of motor sequence learning through physical practice or motor imagery. After an initial training session with either physical practice or motor imagery, participants underwent overnight consolidation. As control condition, participants underwent wake-related consolidation after training with motor imagery. Behavioral analyses revealed that overnight consolidation of motor learning through motor imagery outperformed wake-related consolidation (95% CI [0.02, 0.07], P < 0.001, RP2 = 0.05). As regions of interest, we selected the generators of event-related synchronization/desynchronization of alpha (8-12 Hz) and beta (15-30 Hz) oscillations, which predicted the level of performance on the motor sequence. This yielded a primary sensorimotor-premotor network for alpha oscillations and a cortico-cerebellar network for beta oscillations. The alpha network exhibited increased neural desynchronization after overnight consolidation compared to wake-related consolidation. By contrast, the beta network exhibited an increase in neural synchronization after wake-related consolidation compared to overnight consolidation. We provide the first evidence of parallel brain plasticity underlying behavioral changes associated with sleep-dependent consolidation of motor skill learning through motor imagery and physical practice.
运动想象类似于身体练习，可以通过经验性可塑性提高运动表现。我们使用脑磁图研究了通过物理练习或运动想象进行离线巩固时与运动序列学习相关的大脑活动变化。在初始训练后，参与者接受了一夜的巩固。作为对照条件，参与者在进行运动想象训练后进行了与觉醒相关的巩固。行为分析表明，通过运动想象进行的运动学习的夜间巩固优于与觉醒相关的巩固（95%CI[0.02，0.07]，P<0.001，RP2=0.05）。作为感兴趣的区域，我们选择了与事件相关的同步/去同步α（8-12 Hz）和β（15-30 Hz）振荡的发生器，这预测了运动序列的表现水平。这产生了一个用于α振荡的主要感觉运动-运动前网络和一个用于β振荡的皮质-小脑网络。与与觉醒相关的巩固相比，夜间巩固后α网络的神经去同步增加。相比之下，与夜间巩固相比，与觉醒相关的巩固后β网络的神经同步增加。我们提供了第一个证据，证明在睡眠依赖性运动技能学习的巩固过程中，运动想象和身体练习都涉及到平行的大脑可塑性。
