Age-related changes in finger-force-control is characterized by force production with lower amplitudes

Vieluf, Solveig, Godde, Ben, Reuter, Eva-Maria and Voelcker-Rehage, Claudia (2013) Age-related changes in finger-force-control is characterized by force production with lower amplitudes. Experimental Brain Research, 224 1: 107-117. doi:10.1007/s00221-012-3292-4


Author Vieluf, Solveig
Godde, Ben
Reuter, Eva-Maria
Voelcker-Rehage, Claudia
Title Age-related changes in finger-force-control is characterized by force production with lower amplitudes
Journal name Experimental Brain Research   Check publisher's open access policy
ISSN 0014-4819
1432-1106
Publication date 2013-01
Year available 2013
Sub-type Article (original research)
DOI 10.1007/s00221-012-3292-4
Open Access Status
Volume 224
Issue 1
Start page 107
End page 117
Total pages 11
Place of publication Heidelberg, Germany
Publisher Springer
Language eng
Formatted abstract
It has been repeatedly shown that precise finger force control declines with age. The tasks and evaluation parameters used to reveal age-related differences vary between studies. In order to examine effects of task characteristics, young adults (18–25 years) and late middle-aged adults (55–65 years) performed precision grip tasks with varying speed and force requirements. Different outcome variables were used to evaluate age-related differences. Age-related differences were confirmed for performance accuracy (TWR) and variability (relative root mean square error, rRMSE). The task characteristics, however, influenced accuracy and variability in both age groups: Force modulation performance at higher speed was poorer than at lower speed and at fixed force levels than at force levels adjusted to the individual maximum forces. This effect tended to be stronger for older participants for the rRMSE. A curve fit confirmed the age-related differences for both spatial force tracking parameters (amplitude and intercept) and for one temporal parameter (phase shift), but not for the temporal parameter frequency. Additionally, matching the timing parameters of the sine wave seemed to be more important than matching the spatial parameters in both young adults and late middle-aged adults. However, the effect was stronger for the group of late middle-aged, even though maximum voluntary contraction was not significantly different between groups. Our data indicate that changes in the processing of fine motor control tasks with increasing age are caused by difficulties of late middle-aged adults to produce a predefined amount of force in a short time.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Human Movement and Nutrition Sciences Publications
 
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Created: Thu, 04 Jun 2015, 14:37:26 EST by Sandrine Ducrot on behalf of School of Human Movement and Nutrition Sciences