Patterns of Movement Performance and Consistency From Childhood to Old Age

in Motor Control

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Jessica PreborSchool of Rehabilitation Sciences, Old Dominion University, Norfolk, VA, USA

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Brittany SamulskiSchool of Rehabilitation Sciences, Old Dominion University, Norfolk, VA, USA

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Cortney Armitano-LagoDepartment of Exercise and Sport Science, The University of North Carolina at Chapel Hill, Chapel Hill, NC, USA

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Steven MorrisonSchool of Rehabilitation Sciences, Old Dominion University, Norfolk, VA, USA

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It is widely accepted that the general process of aging can be reflected by changes in motor function. Typically, optimal performance of a given motor task is observed for healthy young adults with declines being observed for individuals at either end of the lifespan. This study was designed to examine differences in the average and variability (i.e., intraindividual variability) of chewing, simple reaction time, postural control, and walking responses. For this study, 15 healthy children, 15 young adults, and 15 older adults participated. Our results indicated the movement performance for the reaction time and postural sway followed a U shape with young adults having faster reaction times and decreased postural sway compared to the children and older adults. However, this pattern was not preserved across all motor tasks with no age differences emerging for (normalized) gait speed, while chewing rates followed a U-shaped curve with older adults and children chewing at faster rates. Taken together, these findings would indicate that the descriptive changes in motor function with aging are heavily influenced by the nature of the task being performed and are unlikely to follow a singular pattern.

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