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左右大脑半球在动作时间上的差异贡献。

Differential contributions of the two human cerebral hemispheres to action timing.

机构信息

Cognitive Neuroscience Group, Brain Imaging Center and Department of Neurology, Goethe University, Frankfurt, Germany.

Movement Disorders and Neurostimulation, Biomedical Statistics and Multimodal Signal Processing Unit, Department of Neurology, Johannes Gutenberg University, Mainz, Germany.

出版信息

Elife. 2019 Nov 7;8:e48404. doi: 10.7554/eLife.48404.

DOI:10.7554/eLife.48404
PMID:31697640
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6837842/
Abstract

Rhythmic actions benefit from synchronization with external events. Auditory-paced finger tapping studies indicate the two cerebral hemispheres preferentially control different rhythms. It is unclear whether left-lateralized processing of faster rhythms and right-lateralized processing of slower rhythms bases upon hemispheric timing differences that arise in the motor or sensory system or whether asymmetry results from lateralized sensorimotor interactions. We measured fMRI and MEG during symmetric finger tapping, in which fast tapping was defined as auditory-motor synchronization at 2.5 Hz. Slow tapping corresponded to tapping to every fourth auditory beat (0.625 Hz). We demonstrate that the left auditory cortex preferentially represents the relative fast rhythm in an amplitude modulation of low beta oscillations while the right auditory cortex additionally represents the internally generated slower rhythm. We show coupling of auditory-motor beta oscillations supports building a metric structure. Our findings reveal a strong contribution of sensory cortices to hemispheric specialization in action control.

摘要

节奏动作得益于与外部事件的同步。听觉节拍手指敲击研究表明，两个大脑半球优先控制不同的节奏。目前尚不清楚更快节奏的左偏处理和更慢节奏的右偏处理是基于运动或感觉系统中出现的半球定时差异，还是不对称性是由偏侧感觉运动相互作用引起的。我们在对称的手指敲击期间测量了 fMRI 和 MEG，其中快速敲击被定义为在 2.5 Hz 时听觉-运动同步。慢敲击对应于每四个听觉节拍（0.625 Hz）的敲击。我们证明，左听觉皮层优先在低频β振荡的幅度调制中表示相对较快的节奏，而右听觉皮层另外表示内部产生的较慢节奏。我们显示听觉-运动β振荡的耦合支持构建度量结构。我们的发现揭示了感觉皮层对动作控制中半球专业化的重要贡献。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/be76962e4e24/elife-48404-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/aaf9f7e0f071/elife-48404-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/28311e38808e/elife-48404-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/5faed6df4c27/elife-48404-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/2376a1d9ad5d/elife-48404-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/8fcac1d35d5e/elife-48404-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/1ca4cb746515/elife-48404-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/119d1812ecf3/elife-48404-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/5f07b874d65f/elife-48404-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/995bc82d7a50/elife-48404-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/be76962e4e24/elife-48404-fig10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/aaf9f7e0f071/elife-48404-fig1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/28311e38808e/elife-48404-fig2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/5faed6df4c27/elife-48404-fig3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/2376a1d9ad5d/elife-48404-fig4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/8fcac1d35d5e/elife-48404-fig5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/1ca4cb746515/elife-48404-fig6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/119d1812ecf3/elife-48404-fig7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/5f07b874d65f/elife-48404-fig8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/995bc82d7a50/elife-48404-fig9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/2e3c/6837842/be76962e4e24/elife-48404-fig10.jpg

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