Beneficial effects of ambiguous precues: Parallel motor preparation or reduced premotoric processing time?
Beneficial effects of ambiguous precues: Parallel motor preparation or reduced premotoric processing time?
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DOI：
10.1111/j.1469-8986.2004.00155.x
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发表时间：
2004-03-01
期刊：
影响因子：
3.7
通讯作者：
Ridderinkhof, KR
中科院分区：
文献类型：
--
作者：
Jentzsch, I;Leuthold, H;Ridderinkhof, KR
本研究的目的是调查潜在的机制运动预编程的情况下，信息丰富，但模糊的precue信息。在一个反应梳理任务，涉及弯曲或伸展运动与右或左食指，空间兼容precue传达部分信息，关于侧，关于方向，没有参数信息（模棱两可的条件），或根本没有信息。提前运动准备表明反应时间缩短所有信息precue条件。刺激和反应锁定的偏侧准备电位发作的分析揭示了一个明确的和排他性的运动起源的模糊precue的好处。额外的分析排除了一个战略试验的两个模糊的替代品之一的试验选择，并提供了证据，一个平行的准备两个响应的替代品时，只提供有关方向或模糊的precue信息。
The present study was designed to investigate the mechanisms underlying movement preprogramming in situations where informative but ambiguous precue information is used. In a response preening task that involved flexi on or extension movements with the right or left index finger, a spatially compatible precue conveyed partial information about side, about direction, no parameter information (ambiguous condition), or no information at all. Advance movement preparation was indicated by reaction-time shortening for all informative precue conditions. The analysis of stimulus- and response-locked lateralized readiness potential onsets revealed a clear and exclusive motoric origin of the ambiguous-precue benefit. Additional analyses ruled out a strategic trial by trial choice of just one of the two ambiguous alternatives and provided evidence for a parallel preparation of both response alternatives when information only about direction or ambiguous precue information is provided.