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Hemispheric lateralization in aging: interest of the verbal-manual concurrency paradigm
Anne Petit1, Thierry Constans, Karl Mondon
1Geriatric Medicine Unit, CHRU Tours, F. Rabelais University, Tours, France. annecougnaud2002@yahoo.fr
Introduction:
The aim of this study was to evaluate whether the classic asymmetry seen in hemispheric functioning is modified in older adults by using a verbal-manual concurrency task.
Method:
Thirty-five right-handed participants divided into two groups according to age (15 older participants, mean age: 68 ? 8 years, without cognitive decline and 20 younger participants, mean age: 23 ? 2 years) had to perform a 30-second uni-manual tapping task, in both a single task (tapping alone) and dual task (tapping and performing a letter fluency task together) condition.
Results:
In younger participants, the letter fluency task disrupted the right hand more than the left hand whereas, in older participants, the letter fluency task disrupted both hands equally.
Conclusion:
These results should be considered preliminary data using a behavioral dual task condition, which might be useful for studying lateralized hemispheric functioning and the processes of divided attention during aging.
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Lateralization
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