ArticleFrontiers in aging neuroscience2015
Visuomotor Correction is a Robust Contributor to Force Variability During Index Finger Abduction by Older Adults.
Article in Frontiers in aging neuroscience, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Aging impairs bimanual isometric force smoothness.EXCLI journal · 2026Article
- Force/moment tracking performance during constant-pose, force-varying, bilaterally symmetric, hand-wrist tasks.Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology · 2023Article
- Encouraging probiotics for the prevention and treatment of immune-related adverse events in novel immunotherapies against malignant glioma.Exploration of targeted anti-tumor therapy · 2022Article
- Visual feedback improves bimanual force control performances at planning and execution levels.Scientific reports · 2021Article
- Age-related deficits in bilateral motor synergies and force coordination.BMC geriatrics · 2019Article
- Performance, complexity and dynamics of force maintenance and modulation in young and older adults.PloS one · 2019Article
- Handgrip force steadiness in young and older adults: a reproducibility study.BMC musculoskeletal disorders · 2018Article
- Variations in Static Force Control and Motor Unit Behavior with Error Amplification Feedback in the Elderly.Frontiers in human neuroscience · 2017Article
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5 authors.
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Abstract
We examined aging-related differences in the contribution of visuomotor correction to force fluctuations during index finger abduction via the analysis of two datasets from similar subjects. Study (1) Young (N = 27, 23 ± 8 years) and older adults (N = 14, 72 ± 9 years) underwent assessment of maximum voluntary contraction force (MVC) and force steadiness during constant-force (CF) index finger abduction (2.5, 30, 65% MVC). For each trial, visual feedback of the force (VIS) was provided for 8-10 s and removed for 8-10 s (NOVIS). Visual gain of the force feedback at 2.5% MVC was high; 12- and 26-fold greater than the 30 and 65% MVC targets. Mean force, standard deviation (SD) of force, and coefficient of variation (CV) of force was calculated for detrended (<0.5 Hz drift removed) VIS and NOVIS data segments. Study (2) A similar group of 14 older adults performed discrete, randomly-ordered VIS or NOVIS trials at low target forces (1-3% MVC) and high visual gain. Study (1) For young adults the CV of force was similar between VIS and NOVIS for the 2.5% (4.8 vs. 4.3%), 30% (3.2 vs. 3.2%) and 65% (3.5 vs. 4.2%) target forces. In contrast, for older adults the CV of force was greater for VIS than NOVIS for 2.5% MVC (6.6 vs. 4.2%, p < 0.001), but not for the 30% (2.4 vs. 2.4%) and 65% (3.1 vs. 3.3%) target forces. At 2.5% MVC, the increase in CV of force for VIS compared with NOVIS was significantly greater (age × visual condition p = 0.008) for older than young adults. Study (2) Similarly, for older adults performing discrete, randomly ordered trials the CV of force was greater for VIS than NOVIS (6.04 vs. 3.81%, p = 0.01). When visual force feedback was a dominant source of information at low forces, normalized force variability was ~58% greater for older adults, but only 11% greater for young adults. The significant effect of visual feedback for older adults was not dependent on the order of presentation of visual conditions. The results indicate that impaired processing of visuomotor information underlies the greater motor variability observed in older adults during lab-based isometric contractions of a hand muscle.
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