Assessing age-related proprioceptive changes through active and passive tasks: implications for stroke assessment.

Erick Carranza, Sreten Franovic, Amy Boos, Elvira Pirondini
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Abstract

Objective.Voluntary control of motor actions requires precise regulation of proprioceptive and somatosensory functions. While aging is known to impair sensory processing, its effect on proprioception remains unclear. Previous studies report conflicting findings on whether passive proprioception (i.e. during externally driven movements) declines with age, and research on age-related changes in active proprioception (i.e. during voluntary movements) remains limited, particularly in the upper limb. Understanding these changes is critical for identifying and preventing impairments that may affect movement performance and mobility, particularly in neurological conditions such as stroke or Parkinson's disease.Approach.We refined a robotic protocol to assess upper-limb active proprioception and validated its robustness and reliability over multiple sessions. Using this protocol, we compared the performance between young and elderly neurologically healthy adults during both active and passive proprioceptive tasks.Main results.Elderly participants exhibited a significant decline in accuracy when sensing limb position in both active and passive proprioceptive tasks, whereas their precision remained unchanged. These findings indicate that aging primarily affects proprioceptive accuracy rather than variability in position sense.Significance.Our findings contribute to the ongoing debate on age-related proprioceptive decline and highlight the importance of distinguishing between active and passive proprioception. Furthermore, our validated robotic protocol provides a reliable tool for assessing proprioception, with potential applications in studying neurological conditions in clinical settings.

通过主动和被动任务评估与年龄相关的本体感觉变化:对中风评估的影响。
目的:运动动作的自主控制需要本体感觉和体感功能的精确调节。虽然已知衰老会损害感觉加工,但其对本体感觉的影响尚不清楚。关于被动本体感觉(即在外部驱动的运动中)是否随着年龄的增长而下降,先前的研究报告了相互矛盾的结果,而关于主动本体感觉(即在自主运动中)与年龄相关的变化的研究仍然有限,特别是在上肢。了解这些变化对于识别和预防可能影响运动表现和活动能力的损伤至关重要,特别是在中风或帕金森病等神经系统疾病中。方法:我们改进了一个机器人方案来评估上肢主动本体感觉,并在多个会话中验证了其稳健性和可靠性。使用该方案,我们比较了年轻和老年神经健康成人在主动和被动本体感受任务中的表现。主要结果:老年人在主动式和被动式本体感受任务中感知肢体位置的准确性明显下降,但其精度保持不变。这些结果表明,衰老主要影响本体感觉的准确性,而不是位置感的变异性。意义:我们的研究结果有助于对年龄相关本体感觉衰退的持续争论,并强调区分主动和被动本体感觉的重要性。此外,我们验证的机器人方案为评估本体感觉提供了可靠的工具,在临床环境中研究神经系统疾病具有潜在的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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