Division of Sports Medicine, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
Department of Rehabilitation Sciences, Ghent University, Ghent, Belgium.
Exp Brain Res. 2024 Nov;242(11):2583-2597. doi: 10.1007/s00221-024-06927-3. Epub 2024 Sep 23.
This study investigated differences in electroencephalography (EEG) activity within motor-related brain areas during three phases of a single-leg squat (SLS)-i.e., descending, holding, and ascending phases. Specifically, utilizing advanced magnetic resonance imaging guided EEG source localization techniques and markerless motion capture technology, we explored the interplay between concurrently recorded lower-extremity biomechanics and brain activity. Among the phases of a nondominant leg SLS, differences in contralateral brain activity (right hemisphere) were found in the activity of the precentral gyrus, the postcentral gyrus, and the sensory motor area. Alternatively, during the dominant SLS leg, differences among the three SLS phases in contralateral brain activity were fewer. Hemispheric dependent brain activity also significantly correlated with participants' knee valgus angle range of motion (right hemisphere) and peak knee valgus angles (left hemisphere). In addition to the novel brain and biomechanical findings, this study sheds light on the technical feasibility of recording EEG during complex multi-joint movements and its potential applications in understanding sensorimotor behavior.
本研究调查了单腿深蹲（SLS）三个阶段——即下降、保持和上升阶段——中与运动相关的大脑区域内脑电图（EEG）活动的差异。具体来说，我们利用先进的磁共振成像引导 EEG 源定位技术和无标记运动捕捉技术，探索了同时记录的下肢生物力学和大脑活动之间的相互作用。在非主导腿 SLS 的各个阶段，对侧大脑（右半球）的中央前回、中央后回和感觉运动区的活动存在差异。相反，在主导腿 SLS 期间，三个 SLS 阶段的对侧大脑活动差异较少。半球依赖的大脑活动也与参与者的膝关节外翻角度运动范围（右半球）和最大膝关节外翻角度（左半球）显著相关。除了新的大脑和生物力学发现外，本研究还揭示了在复杂多关节运动中记录 EEG 的技术可行性及其在理解感觉运动行为中的潜在应用。
