Age-related changes in hand dominance and functional asymmetry in older adultsReport as inadecuate




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The aim of the study was to investigate fine motor performance and ascertain age-related changes in laterality between the dominant and non-dominant hand. A representative sample of 635 adults 144 males and 491 females aged 50 years and over completed a test battery MLS Motor Performance Series to assess a broad range of hand functions. Functional asymmetry was observed in all four motor tests postural tremor, aiming, tapping, and inserting long pins. Significant differences between the dominant and non-dominant hand were obtained in both sexes across all age groups, except in the oldest female group age >70 for the aiming number of hits and errors and postural tremor number of errors tasks. These differences in age-related changes may be attributed to hemispheric asymmetry, environmental factors, or use-dependent plasticity. Conflicting evidence in the literature warrants additional research to better explain age-related alterations of hand dominance and manual performance in old age.



Author: Anna Sebastjan , Anna Skrzek, Zofia Ignasiak, Teresa Sławińska

Source: http://plos.srce.hr/



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