Silva Paula, Moreno Miguel, Mancini Marisa, Fonseca Sergio, Turvey M T
Center for Ecological Study of Perception and Action, University of Connecticut, Storrs, CT, USA.
Neurosci Lett. 2007 Dec 11;429(1):64-8. doi: 10.1016/j.neulet.2007.09.066. Epub 2007 Oct 11.
Stress at one body segment can influence rhythmic movements of non-neighboring body segments. The nervous, circulatory, and fascia (connective tissue) systems are potential mediators of such remote effects. Assessing them begins with a detailed description of the remote effects. Precisely, how do the rhythmic movements change? In our experiment with seven participants, left-hand oscillations of held pendulums at self-selected frequencies were examined as a function of right-hand tonic forces of 0, 10 or 20% of the maximum voluntary contraction. We evaluated the effect of the right hand's tonic force on the amplitude and frequency, and the stiffness and friction functions of the left hand's oscillations. Our results suggest that (a) amplitude and stiffness (both linear and non-linear) increased with tonic force but frequency and friction (both linear and non-linear) did not, and (b) the stiffness increases due to right hand 10 and 20% stress were indifferent to the initial (0%) left-hand stiffness values. Discussion took note of how the nervous system and architectural features of the body (e.g., its network of connective tissue) may produce such effects.
身体某一部位的压力会影响非相邻身体部位的节律性运动。神经、循环和筋膜（结缔组织）系统是这种远程效应的潜在介导因素。对它们的评估始于对远程效应的详细描述。确切地说，节律性运动是如何变化的？在我们对7名参与者进行的实验中，以最大自主收缩力的0%、10%或20%的右手强直力为函数，研究了手持摆锤在自选频率下的左手摆动情况。我们评估了右手强直力对左手摆动的幅度和频率以及刚度和摩擦函数的影响。我们的结果表明：（a）幅度和刚度（线性和非线性）随强直力增加而增加，但频率和摩擦（线性和非线性）则不然；（b）右手施加10%和20%应力时导致的刚度增加与左手初始（0%）刚度值无关。讨论关注了神经系统和身体的结构特征（如结缔组织网络）可能如何产生这种效应。
