Two-component models of reaching: evidence from deafferentation in a Fitts' law task.
Two-component models of reaching: evidence from deafferentation in a Fitts' law task.
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DOI：
10.1016/j.neulet.2009.01.002
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发表时间：
2009-02-27
影响因子：
2.5
通讯作者：
Coslett HB
中科院分区：
文献类型：
--
作者：
Medina J;Jax SA;Coslett HB
前馈和反馈机制均用于确保精确的运动。反馈信息主要来自视觉和本体感觉；这些模式对在线行动控制和内部模型维护的相对贡献仍不清楚。我们报告了一项实验的数据，在该实验中，一名长期传入神经聋的受试者（JDY）和九名对照者被要求在有视力和无视力的情况下接触不同大小的目标。在有视力和无视力的试验中，对照的运动时间符合菲茨定律。 JDY的运动时间仅在视觉上符合菲茨定律。相对于有视力的对照组，她的准确性不高，但与没有视力的对照组相比，她的表现下降明显更大。最后，JDY 在视力试验中的表现随着之前视力不可用的试验数量的增加而恶化。这些数据为运动控制的经典模型提供了支持，该模型将运动分为由效应复制引导的初始弹道运动和感觉反馈至关重要的最终阶段。此外，这些数据还表明需要本体感觉来校准和维持内部行动模型。
Both feedforward and feedback mechanisms are used to ensure accurate movements. Feedback information comes primarily from vision and proprioception; the relative contributions of these modalities to on-line control of action and internal model maintenance remain unclear. We report data from an experiment in which a chronically deafferented subject (JDY) and nine controls were asked to reach to targets of different sizes both with and without vision. Movement times of controls were consistent with Fitts’ Law on trials with and without vision. JDY’s movement times were consistent with Fitts’ Law only with vision. She was inaccurate relative to controls with vision but exhibited a significantly greater decrement in performance than controls without vision. Finally, JDY’s performance on trials with vision deteriorated as a function of the number of preceding trials on which vision was not available. These data provide support for classical models of motor control that divide reaching into an initial ballistic movement guided by efference copy, and a terminal stage where sensory feedback is crucial. Furthermore, these data also demonstrate that proprioception is needed to calibrate and maintain internal models of action.
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影响因子：
2.6
作者：
Crawford, JR;Garthwaite, PH
通讯作者：
Garthwaite, PH
DOI：
10.1080/14640748708401806
发表时间：
1987-11-01
期刊：
QUARTERLY JOURNAL OF EXPERIMENTAL PSYCHOLOGY SECTION A-HUMAN EXPERIMENTAL PSYCHOLOGY
影响因子：
--
作者：
MACKENZIE, CL;MARTENIUK, RG;EICKMEIER, B
通讯作者：
EICKMEIER, B
影响因子：
1.8
作者：
WELFORD, AT;NORRIS, AH;SHOCK, NW
通讯作者：
SHOCK, NW
DOI：
10.1037/0096-1523.7.5.1019
发表时间：
1981-01-01
影响因子：
2.1
作者：
CARLTON, LG
通讯作者：
CARLTON, LG
影响因子：
22.4
作者：
Elliott, D;Helsen, WF;Chua, R
通讯作者：
Chua, R