Aging Affects the Mental Rotation of Left and Right HandsReport as inadecuate




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Background

Normal aging significantly influences motor and cognitive performance. Little is known about age-related changes in action simulation. Here, we investigated the influence of aging on implicit motor imagery.

Methodology-Principal Findings

Twenty young mean age: 23.9±2.8 years and nineteen elderly mean age: 78.3±4.5 years subjects, all right-handed, were required to determine the laterality of hands presented in various positions. To do so, they mentally rotated their hands to match them with the hand-stimuli. We showed that: 1 elderly subjects were affected in their ability to implicitly simulate movements of the upper limbs, especially those requiring the largest amplitude of displacement and-or with strong biomechanical constraints; 2 this decline was greater for movements of the non-dominant arm than of the dominant arm.

Conclusions-Significance

These results extend recent findings showing age-related alterations of the explicit side of motor imagery. They suggest that a general decline in action simulation occurs with normal aging, in particular for the non-dominant side of the body.



Author: Arnaud Saimpont , Thierry Pozzo, Charalambos Papaxanthis

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



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