Preliminary findings of finger independency and visual force control in children with DCD

  • Marcio Alves de Oliveira University of Maryland - marcio@umd.edu
Keywords: finger, force control, EEG, DCD, children, enslaving

Abstract

To examine finger force independency, maximum voluntary force (MVF), force enslaving (FE) and force sharing (FS) values were computed. To analyze the ability of children with DCD to visually control their finger forces, the following performance measures were calculated: rate of force change, initial overshoot, coefficient of variation (CV), root mean square error (RMSe), and inter-trial variability. The results from the MVF task showed that children with DCD as compared with TD children (a) produced similar levels of maximum finger force; (b) demonstrated less finger independency;(c) had similar finger-force sharing patterns. In addition, from the VFC task we found (d) larger performance errors in children with DCD;(e) and lower inter-trial consistency as compared to their TD peers.Our preliminary findings suggest that the impairments in manipulative skills often observed in children with DCD during everyday activities may be related to deficits in finger independency.Additionally we found that children with DCD do not have difficulties in reducing the number of joint/muscle-level degrees of freedom in order to achieve a common motor task.

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Published
2015-11-23
Section
Research Articles