It is often claimed that merely seeing a graspable object can elicit the implicit representation of a potential grasp. But can this representation affect the explicit execution of an actual grasp, and if so, how? In an open-loop paradigm, we instructed participants to grasp small, medium, or large test disks with the appropriate grip configuration (pincer, tripod, or pentapod). Before the presentation of these tests, we presented congruent or incongruent distractors. To assess interactions between implicit (putatively elicited by the distractors) and explicit (actually executed) sensorimotor processes, we measured preview reaction times (as an index of action preparation) and grasp kinematics (as an indicator of sensorimotor representations for motor control). Results indicate that action preparation is indeed affected by the presentation of preceding distractors. However, costs in action preparation were measured only when the first, implicit process was less precise than that of the actual grasp. We suggest that an interaction occurs at the level of sensorimotor processes through a mechanism which generalizes a precision parameter. We interpret these findings in relation to processes involved in real-time motor control and within the framework of theories of motor cognition.

通常声称，仅看到可抓取的物体可能会引起潜在抓握的隐式表示。但是，这种表示是否会影响实际掌握的显式执行？如果是，则如何？在开环范例中，我们指示参与者以适当的抓握配置（钳子，三脚架或五脚架）抓紧小，中或大型测试盘。在介绍这些测试之前，我们介绍了一致或不一致的干扰因素。为了评估隐式（据推测由干扰因素引起）和显式（实际执行）感觉运动过程之间的相互作用，我们测量了预见反应时间（作为动作准备的指标）并掌握了运动学（作为运动控制的感觉运动表示的指标）。结果表明，行动准备确实受到先前干扰因素的影响。但是，仅在第一个隐式过程不如实际掌握的过程精确时，才评估行动准备中的成本。我们建议通过概括精确度参数的机制在感觉运动过程的水平上发生相互作用。我们将这些发现解释为与实时运动控制中涉及的过程有关，并在运动认知理论的框架内进行解释。