Grasp-Dependent Modulations in EEG-EMG Coherence Are Observed in Young but Not Older Adults
EEG-EMG coherence (Corticomuscular coherence – CMC) reveals the functional connection between the cortical activity and muscle activity during voluntary movements. During voluntary movements the cortical and muscle activity are synchronized in the beta band range. Age-related deterioratio...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
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| Series: | IEEE Transactions on Neural Systems and Rehabilitation Engineering |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/11004168/ |
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| Summary: | EEG-EMG coherence (Corticomuscular coherence – CMC) reveals the functional connection between the cortical activity and muscle activity during voluntary movements. During voluntary movements the cortical and muscle activity are synchronized in the beta band range. Age-related deteriorations in the central and peripheral system can impair communication between the brain’s cortical regions and the muscle activity. This study aim to examine the beta band EEG – EMG coherence in older individuals and compare the results with young adults. Twenty-two-channel EEG and two-channel EMG data were collected from twenty healthy young adults aged 20–30 (<inline-formula> <tex-math notation="LaTeX">$26.96\pm 2.68$ </tex-math></inline-formula>) and fourteen older adults aged 58–72 (<inline-formula> <tex-math notation="LaTeX">$62.57\pm 3.58$ </tex-math></inline-formula>). Participants were instructed to hold a handle gently for five seconds, then lift and hold it for an additional five seconds under fixed and free conditions (with the thumb platform either fixed or sliding). EEG – EMG coherence magnitude was lower in the older group compare to the young group. Furthermore, the magnitude of EEG-EMG coherence of the young group was greater in the fixed condition than the free condition. In contrast, no difference in EEG-EMG coherence magnitude was observed in the older group between the task conditions. In summary, older adults exhibit reduced and consistent EEG – EMG coherence across different motor tasks compared to younger adults, reflecting age-related declines in neural synchrony and motor control efficiency. In contrast, younger individuals exhibit task related modulation in EEG-EMG coherence magnitude. This suggests a fundamental difference in motor control mechanisms between younger and older populations during task performance. |
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| ISSN: | 1534-4320 1558-0210 |