Temprado J J, Swinnen S P, Carson R G, Tourment A, Laurent M
UMR 6552 Mouvement et Perception, Université de la Méditerranée et CNRS, Faculté des Sciences du Sport, 163 Avenue de Luminy, BP 910, 13288 Marseille, France.
Hum Mov Sci. 2003 Aug;22(3):339-63. doi: 10.1016/s0167-9457(03)00049-6.
We investigated how the relative direction of limb movements in external space (iso- and non-isodirectionality), muscular constraints (the relative timing of homologous muscle activation) and the egocentric frame of reference (moving simultaneously toward/away the longitudinal axis of the body) contribute to the stability of coordinated movements. In the first experiment, we attempted to determine the respective stability of isodirectional and non-isodirectional movements in between-persons coordination. In a second experiment, we determined the effect of the relative direction in external space, and of muscular constraints, on pattern stability during a within-person bimanual coordination task. In the third experiment we dissociated the effects on pattern stability of the muscular constraints, relative direction and egocentric frame of reference. The results showed that (1) simultaneous activation of homologous muscles resulted in more stable performance than simultaneous activation of non-homologous muscles during within-subject coordination, and that (2) isodirectional movements were more stable than non-isodirectional movements during between-persons coordination, confirming the role of the relative direction of the moving limbs in the stability of bimanual coordination. Moreover, the egocentric constraint was to some extent found distinguishable from the effect of the relative direction of the moving limbs in external space, and from the effect of the relative timing of muscle activation. In summary, the present study showed that relative direction of the moving limbs in external space and muscular constraints may interact either to stabilize or destabilize coordination patterns.
我们研究了外部空间中肢体运动的相对方向（同向和非同向性）、肌肉限制（同源肌肉激活的相对时间）以及以自我为中心的参照系（同时朝向/远离身体纵轴移动）如何影响协调运动的稳定性。在第一个实验中，我们试图确定人际协调中同向和非同向运动各自的稳定性。在第二个实验中，我们确定了外部空间中的相对方向和肌肉限制对个体内双手协调任务中模式稳定性的影响。在第三个实验中，我们区分了肌肉限制、相对方向和以自我为中心的参照系对模式稳定性的影响。结果表明：（1）在个体内协调过程中，同源肌肉的同时激活比非同源肌肉的同时激活产生更稳定的表现；（2）在人际协调过程中，同向运动比非同向运动更稳定，这证实了运动肢体的相对方向在双手协调稳定性中的作用。此外，在一定程度上，以自我为中心的限制与外部空间中运动肢体的相对方向的影响以及肌肉激活的相对时间的影响是可区分的。总之，本研究表明，外部空间中运动肢体的相对方向和肌肉限制可能相互作用，从而稳定或破坏协调模式。
