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Prefrontal hyperactivity in older people during motor planning
Marika Berchicci1, Giuliana Lucci, Caterina Pesce
1Dept. of Education in Sports and Human Movement, University of Rome Foro Italico, Piazza Lauro de Bosis 15, 00135 Rome (RM), Italy. m.berchicci@gmail.com
Neuroimage
|June 27, 2012
Summary
Older adults show increased prefrontal brain activity during motor preparation, indicating greater effort for accurate responses. Middle-aged adults exhibit a blend of young and old brain activity patterns.
Area of Science:
- Neuroscience
- Cognitive Aging
- Motor Control
Background:
- Aging affects cognitive functions, including motor preparation and stimulus processing.
- Understanding age-related changes in brain activity is crucial for cognitive health.
- Event-related potentials (ERPs) provide insights into neural processes during tasks.
Purpose of the Study:
- To investigate age-related changes in cortical activity during motor preparation.
- To differentiate age effects on motor planning versus stimulus processing.
- To compare electrophysiological and behavioral responses across younger, middle-aged, and older adults.
Main Methods:
- Investigated movement- and stimulus-locked event-related potentials (ERPs).
- Included 14 younger (mean age 24.4), 14 middle-aged (mean age 49), and 14 older adults (mean age 70).
- Analyzed behavioral responses (accuracy, reaction time) and electrophysiological data (cortical potentials).
Main Results:
- Older adults exhibited prefrontal over-recruitment in movement-related cortical potentials (MRCPs).
- Behavioral slowing in older adults correlated with optimal accuracy.
- Age-related differences were more pronounced in motor planning than stimulus processing.
- Middle-aged adults showed young-like speed but older-like prefrontal overactivation.
- Older adults demonstrated earlier motor preparation onset and larger prefrontal activation for accuracy.
Conclusions:
- Older adults prepare actions with greater anticipation and higher neural cost (prefrontal over-recruitment) to maintain accuracy.
- Aging impacts motor planning more significantly than stimulus processing.
- Middle-aged adults display a transitional pattern of brain activity, suggesting early age-related neural changes.
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