Baker Stuart N
Institute of Neuroscience, Newcastle University, Henry Wellcome Building, Medical School, Framlington Place, Newcastle upon Tyne, NE2 4HH, UK.
Curr Opin Neurobiol. 2007 Dec;17(6):649-55. doi: 10.1016/j.conb.2008.01.007. Epub 2008 Mar 12.
Field potential recordings from motor cortex show oscillations in the beta-band (approximately 20 Hz), which are coherent with similar oscillations in the activity of contralateral contracting muscles. Recent findings have revised concepts of how this activity might be generated in the cortex, suggesting it could achieve useful computation. Other evidence shows that these oscillations engage not just motor structures, but also return from muscle to the central nervous system via feedback afferent pathways. Somatosensory cortex has strong beta-band oscillations, which are synchronised with those in motor cortex, allowing oscillatory sensory reafference to be interpreted in the context of the oscillatory motor command which produced it.
运动皮层的场电位记录显示在β波段（约20赫兹）存在振荡，这些振荡与对侧收缩肌肉活动中的类似振荡相一致。最近的研究结果修正了关于这种活动可能如何在皮层中产生的概念，表明它可以实现有用的计算。其他证据表明，这些振荡不仅涉及运动结构，还通过反馈传入通路从肌肉返回中枢神经系统。体感皮层有强烈的β波段振荡，与运动皮层的振荡同步，使得振荡性感觉再传入能够在产生它的振荡性运动指令的背景下得到解释。
