Learning and transfer of an ipsilateral coordination task: Evidence for a dual-layer movement representation
Learning and transfer of an ipsilateral coordination task: Evidence for a dual-layer movement representation
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DOI：
10.1162/0898929054985392
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发表时间：
2005-09-01
影响因子：
3.2
通讯作者：
Swinnen, SP
中科院分区：
文献类型：
--
作者：
Vangheluwe, S;Wenderoth, N;Swinnen, SP
本研究探讨了肢体间协调任务的记忆表征的性质。为此目的，收购的多频（2：1）任务与同侧肢体和转移到同侧和对侧的身体侧进行了检查。特别是，受试者练习2：1的协调模式，即右臂移动速度是右腿的两倍，反之亦然。随后，他们将练习过的2：1任务转移到三种不同的条件下：（1）匡威伙伴（即，在同侧身体侧，缓慢移动的肢体必须快速移动，反之亦然），以及（2）在对侧身体侧，相同的和（3）匡威2：1模式。结果显示相同和匡威的2：1图形向对侧体侧正传递。然而，没有转让的学习模式，其在同一侧的身体匡威的合作伙伴被发现。我们提出了一个新的记忆表示模型的协调模式，由一个独立的效应器和效应器特定的组件（双层模型）。假设一般运动目标（即，一个肢体的移动速度是另一个肢体的两倍）构成了抽象的、更高层次的表征，可以解释正的对侧转移。相反，效应器特定的组件包含特定于任务的较低水平的肌肉协同作用，通过实践获得，禁止在相同的效应器内转移任务分配时的正迁移。这些发现与最近的神经科学证据一致，即分布式大脑区域的神经可塑性变化。
The present study addressed the nature of the memory representation for interlimb coordination tasks. For this purpose, the acquisition of a multifrequency (2:1) task with the ipsilateral limbs and transfer to the ipsilateral and contralateral body side was examined. In particular, subjects practiced a 2:1 coordination pattern whereby the right arm moved twice as fast as the right leg, or vice versa. Subsequently, they transferred the practiced 2:1 task to three different conditions: (1) the converse partner (i.e., the slow-moving limb had to move fast, and vice versa) at the ipsilateral body side, and (2) the identical and (3) converse 2:1 pattern at the contralateral body side. Findings revealed positive transfer of the identical and converse 2:1 pattern to the contralateral body side. However, no transfer of the learned pattern to its converse partner at the same body side was revealed. We propose a new memory representation model for coordination patterns, composed of an effector-independent and effector-specific component (dual-layer model). It is hypothesized that the general movement goal (i.e., moving one limb twice as fast as the other) constitutes the abstract, higher-level representation that may account for positive contralateral transfer. Conversely, the effector-specific component contains task-specific lower-level muscle synergies that are acquired through practice, prohibiting positive transfer when shifting task allocation within the same effectors. These findings are consistent with recent neuroscientific evidence for neuroplastic changes in distributed brain areas.