Healthy ageing involves degeneration of the neuromuscular system which impacts movement control and proprioception. Yet the relationship between these sensory and motor deficits in upper limb reaching has not been examined in detail. Recently, we reported that age-related proprioceptive deficits were unrelated to accuracy in rapid arm movements, but whether this applied in motor tasks more heavily dependent on proprioceptive feedback was not clear. To address this, we have tested groups of younger and older adults on a force-field adaptation task under either full or limited visual feedback conditions and examined how performance was related to dynamic proprioceptive acuity. Adaptive performance was similar between the age groups, regardless of visual feedback condition, although older adults showed increased after-effects. Physically inactive individuals made larger systematic (but not variable) proprioceptive errors, irrespective of age. However, dynamic proprioceptive acuity was unrelated to adaptation and there was no consistent evidence of proprioceptive recalibration with adaptation to the force-field for any group. Finally, in spite of clear age-dependent loss of spatial working memory capacity, we found no relationship between memory capacity and adaptive performance or proprioceptive acuity. Thus, non-clinical levels of deficit in dynamic proprioception, due to age or physical inactivity, do not affect force-field adaptation, even under conditions of limited visual feedback that might require greater proprioceptive control.

健康老龄化涉及影响运动控制和本体感觉的神经肌肉系统退化。然而，尚未详细检查这些上肢伸展的感觉和运动缺陷之间的关系。最近，我们报道了与年龄相关的本体感觉缺陷与快速手臂运动的准确性无关，但这是否适用于更严重依赖本体感觉反馈的运动任务尚不清楚。为了解决这个问题，我们在完全或有限的视觉反馈条件下测试了年轻人和老年人群体的力场适应任务，并检查了表现与动态本体感觉敏锐度的关系。无论视觉反馈条件如何，不同年龄组的适应性表现相似，尽管老年人表现出增加的后遗症。身体不活跃的个体无论年龄大小都会产生更大的系统性（但不是可变的）本体感受错误。然而，动态本体感觉敏锐度与适应无关，并且没有一致的证据表明本体感觉重新校准与任何组的力场适应。最后，尽管空间工作记忆容量明显与年龄相关，但我们发现记忆容量与适应性表现或本体感受敏锐度之间没有关系。因此，由于年龄或身体不活动而导致的动态本体感觉缺陷的非临床水平不会影响力场适应，即使在可能需要更大本体感觉控制的有限视觉反馈条件下也是如此。动态本体感觉敏锐度与适应无关，并且没有一致的证据表明本体感觉重新校准与任何组的力场适应。最后，尽管空间工作记忆容量明显与年龄相关，但我们发现记忆容量与适应性表现或本体感受敏锐度之间没有关系。因此，由于年龄或身体不活动而导致的动态本体感觉缺陷的非临床水平不会影响力场适应，即使在可能需要更大本体感觉控制的有限视觉反馈条件下也是如此。动态本体感觉敏锐度与适应无关，并且没有一致的证据表明本体感觉重新校准与任何组的力场适应。最后，尽管空间工作记忆容量明显与年龄相关，但我们发现记忆容量与适应性表现或本体感受敏锐度之间没有关系。因此，由于年龄或身体不活动导致的动态本体感觉缺陷的非临床水平不会影响力场适应，即使在可能需要更大本体感觉控制的有限视觉反馈条件下也是如此。我们发现记忆容量与适应性表现或本体感受敏锐度之间没有关系。因此，由于年龄或身体不活动而导致的动态本体感觉缺陷的非临床水平不会影响力场适应，即使在可能需要更大本体感觉控制的有限视觉反馈条件下也是如此。我们发现记忆容量与适应性表现或本体感受敏锐度之间没有关系。因此，由于年龄或身体不活动导致的动态本体感觉缺陷的非临床水平不会影响力场适应，即使在可能需要更大本体感觉控制的有限视觉反馈条件下也是如此。