Age-related differences in corrected and inhibited pointing movements.
Stéphanie Rossit1, Monika Harvey
1Department of Psychology, University of Glasgow, Glasgow G12 8QB, Scotland, UK.
Experimental Brain Research
|September 28, 2007
Summary
Aging does not impair motor control inhibition. While older adults show slower movement initiation and execution, their accuracy in adapting or stopping movements remains comparable to younger individuals, indicating general motor slowing, not specific inhibition deficits.
Area of Science:
- Neuroscience
- Motor Control
- Aging Research
Background:
- Aging typically leads to reduced motor skill performance.
- Older adults exhibit slower adaptation of ongoing movements to target changes.
Purpose of the Study:
- To investigate how aging affects trajectory corrections and movement inhibition.
- To compare adaptation and stopping abilities in younger and older adults.
Main Methods:
- Participants (younger and older) performed reaching movements with target location changes.
- Tasks included adapting to or inhibiting ongoing movements.
- Movement initiation, execution, correction, and inhibition times were measured.
Main Results:
- Older adults were slower in initiating, executing, correcting, and inhibiting movements.
- Accuracy was similar between younger and older groups for both tasks.
- Slowing was also observed for movements to stationary targets.
Conclusions:
- Aging causes general motor slowing and increased variability, not specific deficits in online correction or inhibition.
- Motor inhibition is not decreased with age.
- Motor control in older adults is characterized by generalized slowing rather than impaired inhibition.
