Neural networks for the coordination of the hands in time.
Neural networks for the coordination of the hands in time.
复制标题
用于及时协调双手的神经网络。
DOI：
10.1152/jn.00775.2002
复制
发表时间：
2003
影响因子：
2.5
通讯作者：
H. Ehrsson
中科院分区：
文献类型：
--
作者：
F. Ullén;H. Forssberg;H. Ehrsson
在没有练习的情况下，双手动作通常既可以是同步的，也可以是反相的。复杂的时间协调，例如，在以非整数比率(多节律)以不同频率运动期间，需要训练。在这里，我们使用功能磁共振成像(FMRI)研究同相、反相和多节律协调的神经控制系统的组织。以食指轻快有节奏的敲击作为行为模式。我们展示了在同相和反相协调期间大脑活动的不同模式。同相协调的特征是右侧小脑前部和扣带运动区(CMA)的激活。反相协调伴随着广泛的额顶颞叶激活，包括辅助运动区(SMA)、SMA前区、双侧顶下回、运动前皮质和颞上回。当对比多节律敲击和同相敲击时，在同一组大脑区域，以及在小脑后部和CMA，都可以看到活动。因此，反相和多节律协调在很大程度上可以使用共同的神经控制电路。在另一个单独的实验中，我们分析了在多节奏敲击中对节奏结构和手指运动顺序的神经控制。将多节奏敲击与保持与多节奏相同的手指运动顺序的同步协调模式进行比较。本实验表明，前SMA和双侧颞上回可能对多节律性敲击的节律性控制起关键作用，而小脑、CMA和运动前皮质可能更多地参与手指动作序列的顺序控制。
Without practice, bimanual movements can typically be performed either in phase or in antiphase. Complex temporal coordination, e.g., during movements at different frequencies with a noninteger ratio (polyrhythms), requires training. Here, we investigate the organization of the neural control systems for in-phase, antiphase, and polyrhythmic coordination using functional magnetic resonance imaging (fMRI). Brisk rhythmic tapping with the index fingers was used as a model behavior. We demonstrate different patterns of brain activity during in-phase and antiphase coordination. In-phase coordination was characterized by activation of the right anterior cerebellum and cingulate motor area (CMA). Antiphase coordination was accompanied by extensive fronto-parieto-temporal activations, including the supplementary motor area (SMA), the preSMA, and the bilateral inferior parietal gyri, premotor cortex, and superior temporal gyri. When contrasting polyrhythmic tapping with in-phase tapping, activity was seen in the same set of brain regions, and in the posterior cerebellum and the CMA. Antiphase and polyrhythmic coordination may thus to a large extent use common neural control circuitry. In a separate experiment, we analyzed the neural control of the rhythmic structure and the serial order of finger movements during polyrhythmic tapping. Polyrhythmic tapping was compared with an isochronous coordination pattern that retained the same serial order of finger movements as the polyrhythm. This experiment showed that the preSMA and the bilateral superior temporal gyri may be crucial for the rhythmic control of polyrhythmic tapping, while the cerebellum, the CMA, and the premotor cortices presumably are more involved in the ordinal control of the sequence of finger movements.
交替手攻丝中手间协调的耦合振荡模型：重新评估。
DOI：
10.1037//0096-1523.27.2.251
发表时间：
2001
期刊：
Journal of experimental psychology. Human perception and performance
影响因子：
--
作者：
Semjen,A;Ivry,RB
通讯作者：
Ivry,RB