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首页> 外文期刊>Journal of Mathematical Biology >Critical delay for overshooting in planned arm movements with delayed feedback
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Critical delay for overshooting in planned arm movements with delayed feedback

机译:计划中的手臂运动过冲并延迟反馈的关键延迟

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摘要

The Vector Integration To Endpoint (VITE) circuit describes a real time neural network model which simulates behavioral and neurobiological properties of planned arm movements by the interaction of two populations of neurons. This model is generalized to include delay between the interacting populations, which is found to have a detrimental effect on movement accuracy. Conditions are given on the model parameters for accurate movement and target overshoot, where we show that there exists a non-zero critical value of the delay which the circuit can support while maintaining accurate movement. This critical delay depends on the movement speed, and becomes arbitrarily large for sufficiently slow movement. Thus neurobiological or artificial systems modelled by the VITE sensory-motor loop can tolerate an arbitrarily large delay if the movement speed is sufficiently slow.
机译:端点矢量集成(VITE)电路描述了一个实时神经网络模型,该模型通过两个神经元种群的相互作用来模拟计划的手臂运动的行为和神经生物学特性。该模型被概括为包括相互作用的种群之间的延迟,这被发现对运动准确性有不利影响。在模型参数上给出了用于精确运动和目标过冲的条件,其中我们表明存在一个非零的临界阈值,该延迟可以在保持精确运动的同时支持电路。该临界延迟取决于运动速度,并且对于足够缓慢的运动而言会变得任意大。因此,如果运动速度足够慢,则由VITE感觉运动回路建模的神经生物学或人工系统可以忍受任意大的延迟。

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