StartReact elicits faster, larger, and more appropriate muscle activation in stroke survivors but has been only cursorily studied to date during multi-jointed reaching. Our objective was to evaluate StartReact on unrestricted, two-dimensional point-to-point reaching tasks post-stroke. Data from 23 individuals with stroke were collected during point-to-point reaching. Voluntary and StartReact trials were compared between mild, severe/moderate, and the unimpaired arm. StartReact showed an increase in probability of muscle activity, larger muscle activity amplitude, and faster muscle activity onset. Despite changes in muscle activity, metrics of movement (distance, final error, linear deviation) were not different between StartReact and Voluntary trials except in severe/moderate stroke who had larger reaching distances during StartReact. While StartReact impacted many metrics of muscle activity, the most profound effect was on the probability of muscle activity increasing 34% compared to voluntary which allowed severe/moderate subjects to increase reaching distance but did not translate to decrease in final error suggesting that the additional movement was not always directed towards the appropriate target. These results indicate that SR has the capacity to activate paralyzed muscle in severe/moderate patients, but future studies are needed to explore the possible use of SR in the rehabilitation.

中文翻译：

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在二维到达任务期间，StartReact增加了严重/中度卒中幸存者的肌肉活动和距离的可能性。

StartReact可以使卒中幸存者更快，更大，更合适地激活肌肉，但迄今为止，仅在多关节到达过程中进行过粗略的研究。我们的目标是评估笔划后不受限制的二维点对点到达任务的StartReact。在点对点到达过程中收集了来自23名中风患者的数据。比较了轻度，重度/中度和未受损手臂之间的自愿和StartReact试验。StartReact显示肌肉活动的概率增加，较大的肌肉活动幅度以及更快的肌肉活动发作。尽管肌肉活动发生了变化，StartReact和自愿试验之间的运动指标（距离，最终误差，线性偏差）没有差异，但在StartReact期间达到较远距离的重度/中度卒中除外。尽管StartReact影响了许多肌肉活动指标，但与自愿活动相比，最深刻的影响是肌肉活动可能性增加了34％，这允许严重/中度受试者增加到达距离，但没有转化为最终错误的减少，这表明额外的运动并非总是针对适当的目标。这些结果表明，SR具有激活重度/中度患者瘫痪肌肉的能力，但是需要进一步的研究来探索SR在康复中的可能用途。与自愿活动相比，最深远的影响是肌肉活动的概率增加了34％，自愿性活动可使重度/中度受试者增加到达距离，但并未转化为最终错误的减少，这表明额外的运动并不总是针对适当的目标。这些结果表明，SR具有激活重度/中度患者瘫痪肌肉的能力，但是需要进一步的研究来探索SR在康复中的可能用途。与自愿活动相比，最深远的影响是肌肉活动的概率增加了34％，自愿性活动可使重度/中度受试者增加到达距离，但并未转化为最终错误的减少，这表明额外的运动并不总是针对适当的目标。这些结果表明，SR具有激活重度/中度患者瘫痪肌肉的能力，但是需要进一步的研究来探索SR在康复中的可能用途。