Perceptions of effort and heaviness during fatigue and during the size-weight illusion.
Perceptions of effort and heaviness during fatigue and during the size-weight illusion.
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疲劳期间和体型-重量错觉期间对努力和沉重的感知。
DOI：
10.1080/08990229771051
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Jones,LF
中科院分区：
文献类型：
--
作者：
Burgess,PR;Jones,LF
先前的工作表明，力知觉和运动努力的感觉是感觉运动功能的不同属性。本研究探讨了一个假设，即力量和努力的看法是不同的原因之一是告知一个人受损的运动功能时，肌肉力量落后的努力。这一假说预测，当运动功能因疲劳而受损时，努力和力量知觉将分离，但在大小-重量错觉期间不会分离。所有受试者都报告说，随着疲劳的发展，当举起标准测试重量时，努力明显增加。当疲劳被充分标记，以至于他们几乎不能举起测试重量时，他们将自己的努力评定为与在非疲劳状态下举起最大重量所需的努力相似。随着疲劳的发展，测试重量的感觉沉重也会增加，但这种疲劳-重量错觉小于所有受试者努力的增加，并显示出更大的变异性。相比之下，当小物体和大物体被依次举起时，小物体的感知重量和举起它所需的努力都平行增加。尺寸-重量错觉和尺寸-努力错觉似乎是一种常见现象的例子，在这种现象中，知觉经验被重新调整以在不同的工作条件下保持敏锐度。疲劳-重量错觉还具有随着受试者的举重范围由于疲劳而减小而增加感知敏锐度的效果。
Previous work has shown that force perception and the sense of motor effort are different attributes of sensorimotor function. This study explores the hypothesis that one reason force and effort perceptions are distinct is to inform an individual of impaired motor function when muscular force lags effort. This hypothesis predicts that effort and force perceptions will dissociate when motor function is impaired by fatigue but not during the size-weight illusion. All subjects reported a distinct increase in effort when lifting a standard test weight as fatigue developed. When fatigue was sufficiently marked so that they could barely lift the test weight, they rated their effort as similar to that required to lift a maximal weight in the unfatigued state. The perceived heaviness of the test weight also increased as fatigue developed, but this fatigue-weight illusion was smaller than the increase in effort for all subjects and displayed greater variability. In contrast, both the perceived weight of a small object and the effort required to lift it increased in parallel when small and large objects were lifted sequentially. The size-weight and size-effort illusions appear to be examples of a common phenomenon in which perceptual experience is rescaled to maintain acuity under different working conditions. The fatigue-weight illusion also has the effect of increasing perceptual acuity as the subject's weight lifting range decreases due to fatigue.