Visuomotor Correction is a Robust Contributor to Force Variability During Index Finger Abduction by Older Adults

Visuomotor Correction is a Robust Contributor to Force Variability During Index Finger Abduction by Older Adults

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 maximu...

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Veröffentlicht in:Frontiers in aging neuroscience 2015-12, Vol.7, p.229-229
Hauptverfasser: Tracy, Brian L, Hitchcock, Leah N, Welsh, Seth J, Paxton, Roger J, Feldman-Kothe, Caitlin E
Format: Artikel
Sprache:eng
Schlagworte:
Age differences
Aging
Ankle
Brain research
Contraction
Elderly
Feedback
Force
force control
Hand
Information processing
Isometric
motor variability
Neurons
Neuroscience
Older people
Physiology
Sensorimotor integration
Visual perception
Visual Processing
Young adults
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Zusammenfassung: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 (
ISSN:1663-4365
1663-4365
DOI:10.3389/fnagi.2015.00229