Abstract
Introduction
The objectives of this study were to study the age-specific activation patterns of cerebral areas during motor execution (ME) and motor imaging (MI) of the upper extremities and to discuss the age-related neural mechanisms associated with ME or MI.
Methods
The functional magnetic resonance imaging technique was used to monitor the pattern and intensity of brain activation during the ME and MI of the upper extremities in 20 elderly (>50 years) and 19 young healthy subjects (<25 years).
Results
No major differences were identified regarding the activated brain areas during ME or MI between the two groups; however, a minor difference was noted. The intensity of the activated brain area during ME was stronger in the older group than in the younger group, while the results with MI were the opposite. The posterior central gyrus and supplementary motor area during MI were more active in the younger group than in the older group. The putamen, lingual, and so on demonstrated stronger activation during dominant hand MI in the older group.
Conclusion
The results of this study revealed that the brain structure was altered and that neuronal activity was attenuated with age, and the cerebral cortex and subcortical tissues were found to be over-activated to achieve the same level of ME and MI, indicating that the activating effects of the left hemisphere enhanced with age, whereas the inhibitory effects declined during ME, and activation of the right hemisphere became more difficult during MI.
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Acknowledgment
This work was supported by 2012 National Nature Science “Study on the neural mechanism of motor imagery in the rehabilitation of patients with stroke hemiplegia” (No. 81171866).
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We declare that we have no conflict of interest.
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Wang, L., Qiu, M., Liu, C. et al. Age-specific activation of cerebral areas in motor imagery—a fMRI study. Neuroradiology 56, 339–348 (2014). https://doi.org/10.1007/s00234-014-1331-5
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DOI: https://doi.org/10.1007/s00234-014-1331-5