Lauzière Séléna, Dubois Benjamin, Brière Anabèle, Nadeau Sylvie
Centre de recherche interdisciplinaire en réadaptation, Institut de réadaptation Gingras-Lindsay-de-Montréal, Québec, Canada.
Atten Percept Psychophys. 2012 Jan;74(1):216-24. doi: 10.3758/s13414-011-0223-6.
The accuracy of force perception during muscular contraction has not been studied extensively, despite its importance in rehabilitation and training. The purpose of this study was to quantify the errors made by healthy young and elderly individuals in their perceptions of force produced at the knee. Four different tasks were used to evaluate the perception of force and the effect of a sensory-motor reference and simultaneous contraction on the accuracy of perception. The absolute errors were similar between groups, with values of 11.9% to 16.3%, depending on the task. The raw perception errors were greater for high levels of force (>50% of the maximal voluntary contraction, or MVC), indicating an overestimation of the forces produced for both groups. At 70% MVC, the sensory-motor reference reduced raw perception errors, and the simultaneous contraction improved the accuracy of force production. Healthy young and elderly individuals had about the same capacity to judge the muscular force of their knee extensors. Therapists involved in the training of active elderly individuals should be aware that the accuracy of force perception is not perfect and that these clients have the same ability as young individuals to perceive their knee extension strength.
尽管肌肉收缩过程中力感知的准确性在康复和训练中很重要，但尚未得到广泛研究。本研究的目的是量化健康年轻人和老年人在感知膝关节产生的力时所犯的错误。使用四种不同的任务来评估力感知以及感觉运动参考和同时收缩对感知准确性的影响。根据任务不同，两组之间的绝对误差相似，值在11.9%至16.3%之间。对于高水平的力（>最大自主收缩的50%，即MVC），原始感知误差更大，表明两组对产生的力都有高估。在70%MVC时，感觉运动参考减少了原始感知误差，同时收缩提高了力产生的准确性。健康的年轻人和老年人判断其膝伸肌肌力的能力大致相同。参与活跃老年人训练的治疗师应意识到，力感知的准确性并不完美，而且这些客户与年轻人有相同的能力来感知他们的膝关节伸展力量。
