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首页> 外文期刊>The European Journal of Neuroscience >Production and perception of grip force without proprioception: is there a sense of effort in deafferented subjects?
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Production and perception of grip force without proprioception: is there a sense of effort in deafferented subjects?

机译：没有本体感受的握力的产生和感知：对失聪的受试者是否有努力的感觉？

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We assessed the ability of healthy subjects (n = 7) and a patient deprived of proprioception (GL) to produce and assess different levels of isometric forces. They first produced a target force with one hand (the reference control hand) and then, after a delay of 3 s, they attempted to match it with the other hand (the experimental matching hand). Despite abnormal variations in motor outputs, we found that GL could, as could the control subjects, maintain a constant relationship between the force exerted by the control hand and the force exerted by the experimental hand. As GL was deprived of proprioceptive cues, these results suggest that she indirectly perceived muscular force through central effort. Interestingly, when carrying out the task the patient reported neither feelings of fatigue nor awareness of how hard she tried to perform the matches. Hence, under certain circumstances (such as in our motor task), it seems possible to assess and scale muscular force on the basis of endogenous signals only. However, internally generated signals related to the size of the motor command may need to interact with afferent input to gain full access to consciousness.
机译：我们评估了健康受试者（n = 7）和缺乏本体感受（GL）的患者产生和评估不同水平的等轴测力的能力。他们首先用一只手（参考控制手）产生目标力，然后在延迟3 s之后，他们尝试用另一只手（实验上的匹配手）进行匹配。尽管电机输出出现异常变化，我们发现GL可以像控制对象一样，在控制手所施加的力和实验手所施加的力之间保持恒定的关系。由于GL被剥夺了本体感受提示，这些结果表明她通过集中努力间接感知到了肌肉力量。有趣的是，在执行任务时，患者既没有报告疲劳的感觉，也没有报告她试图进行比赛的努力程度。因此，在某些情况下（例如在我们的运动任务中），似乎仅根据内源性信号评估和缩放肌肉力量是可能的。但是，内部产生的与运动命令大小有关的信号可能需要与传入的输入进行交互，以获得对意识的完全访问。

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