Temprado Jean-Jacques, Vercruysse Sarah, Salesse Robin, Berton Eric
UMR 'Institut des Sciences du Mouvement' CNRS et Université de la Méditerranée, Marseille, France.
Gerontology. 2010;56(3):335-44. doi: 10.1159/000262445. Epub 2009 Nov 26.
The present study examined the effects of aging on the execution of a bimanual coordination task in a classical phase transition paradigm in which coordination patterns (in-phase and anti-phase) and movement frequency were manipulated. Two groups of adults, the so-called young (average age 26 years) and old (average age 71 years) participants, performed both in-phase and anti-phase patterns at different frequencies. As we expected variability of relative phase was larger for older participants than for younger ones for both the in-phase and the anti-phase coordination patterns. Moreover, phase transitions occurred at lower frequencies for older participants and more transitions were observed for older than for younger participants. Although no specific hypotheses were made about the prominent source(s) of age-related changes in coordination dynamics (i.e., an alteration in the coupling function and/or an increase of the magnitude of noise), our results suggest that these changes might result from increases in the (neural) noise to be found in the (bimanual) action system.
本研究在经典相变范式中考察了衰老对双手协调任务执行的影响，该范式中协调模式（同相和反相）及运动频率受到操控。两组成年人，即所谓的年轻参与者（平均年龄26岁）和年长参与者（平均年龄71岁），以不同频率执行同相和反相模式。正如我们所预期的，对于同相和反相协调模式，年长参与者相对相位的变异性均大于年轻参与者。此外，年长参与者的相位转换发生在较低频率，且观察到年长参与者的转换比年轻参与者更多。尽管未针对协调动力学中与年龄相关变化的突出来源（即耦合函数的改变和/或噪声幅度的增加）提出具体假设，但我们的结果表明，这些变化可能源于（双手）动作系统中（神经）噪声的增加。
