Exploring a vibratory systems analysis of human movement production.
Exploring a vibratory systems analysis of human movement production.
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探索人体运动产生的振动系统分析。
DOI：
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发表时间：
1980
影响因子：
2.5
通讯作者：
Kenneth G Holt
中科院分区：
文献类型：
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作者：
J. A;Scott Kel;Kenneth G Holt
人类运动系统最令人向往的属性是肢体使用各种运动轨迹在空间中准确地定位，并且定位相对独立于肢体初始条件的变化来完成。尽管很好地记录了这些特征是动物S和人类的行为特征，但不太清楚的是控制机制的性质(S)既不是当前流行的闭合反馈(Adams，1977)，也不是编程(Schmidt，似乎完全是广告)，尽管闭环模型适应了这样的事实，即在(A)在移动之前的肢体位置(Stelmach，Kelso，&Wallace，1975)或(B)在动作执行过程中引入负荷的突然变化(Houk，1978；Polit&Bizzi，1978)，当同样的发现S可以在去传入条件下被证明时，它是不知所措的(Bizzi&0类似地，不进行反馈监测的中央运动程序可能处理去传入发现，但当面对运动上下文中确实不可预见的变化时，甚至是合并了内部和中央反馈回路的混合模型(Evart，1971；Kelso&Stelmach，1976)很难发现，当猴子失去传入并因此受到不可预测的运动扰动时，可能会产生正常的准确性(Polit&Bizzi，1978)0局部化的另一种方法-源于Bern-Stein的原始工作(1947)1，提出当关节处的肌肉被约束为一个单元时，链接可描述为具有质量的物理和行为特征的一类振动系统-质量弹簧的几个属性对于解释在局部化实验中观察到的控制风格是有利的。也许就我们的目的而言，它的主要特征是本质上是自平衡的；一旦启动，弹簧总是停留在相同的静止长度(平衡点)“无论是弹簧相对于其静止长度的初始挠度的增加还是暂时的扰动都不会阻止平衡点的实现，这一特性被称为确认：我们感谢James Pruitt的帮助和两位匿名的审查者的有益评论。
the most desirable attributes of the human motor system are that of the limbs accurately in space using a variety of movement trajectories and that localization be accomplished relatively independent of changes in the initial conditions of the limbs c Al though it is well-documented that these features are characteristic of the behavioral of both animal s and humans, less clear is the nature of the control mechanism(s) e Neither of the currentl y popular closed-feedback (Adams, 1977) or programming accounts (Schmid t, seem completely ad For , al though a closed-loop model accommodate the fact that achievement of final position is possible in of (a) in limb position prior to movement (Stelmach, Kelso, & Wallace, 1975) or (b) the introduction of abrupt changes in load during movement execution (Houk, 1978; Polit & Bizzi, 1978), it is at a loss when the same finding s can be demonstrated under deafferentation conditions (Bi zzi &0 Similarly, central motor programs that do not ongoing feedback moni toring may handle deafferentation findings, but go awry when confronted with unforeseen changes in the movement contexte Indeed, even a hybrid model that incorporates internal, central feedback loops (Evarts, 1971; Kelso & Stelmach, 1976) has great difficulty with the finding that normal accuracy may result when monkeys are deafferented and consequently subjected to unpredictable movement perturbations (Polit & Bizzi, 1978)0 An al ternative approach to of localization-stemming from Bern-stein's orig inal work (1947) 1, proposes that where muscles at a joint are constrained to act as a unit, the linkage is describable as a class of vibratory system with the physical and behavioral characteristics of a mass-There are several properties of a mass-spring that are advantageous in explaining the style of control observed in localization experiments. Perhaps its major characteristic for our purposes is that it is intrinsically self-equil ibrating; once set in motion the spr ing will al ways come to rest at the same resting length (equilibrium point)" Neither an increase in initial deflection of the spring from its resting length nor temporary perturbations will prevent the achievement of the equil ibrium point, a property known as AcknOWledgment: We thank James Pruitt for his assistance and two anonymous rev iewers for their helpful remarks.