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Related Concept Videos

Hearing01:31

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.

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Older Individuals Do Not Show Task Specific Variations in EEG Band Power and Finger Force Coordination.

Balasubramanian Eswari, Sivakumar Balasubramanian, Varadhan Skm

    IEEE Transactions on Bio-Medical Engineering
    |September 9, 2024
    PubMed
    Summary

    Older adults show consistent finger force control and brain activity regardless of task difficulty. Young adults, however, adapt their strategies, demonstrating reduced finger force coordination and EEG beta band power in more challenging conditions.

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    Area of Science:

    • Neuroscience
    • Motor Control
    • Aging Research

    Background:

    • Hand motor function is essential for daily activities and independence.
    • Aging leads to declines in neural, muscular, and musculoskeletal systems, impairing hand motor control.
    • Reduced cortical activity and finger force control are observed in older adults.

    Purpose of the Study:

    • To independently examine electroencephalography (EEG) band power and finger force coordination in older adults.
    • To compare these measures between older and young healthy adults.
    • To investigate task-dependent adjustments in motor control strategies.

    Main Methods:

    • Twenty young adults (20-30 years) and fourteen older adults (58-72 years) participated.
    • Participants performed finger force tasks under fixed and free conditions.
    • EEG beta band power and finger force synergy indices were recorded.

    Main Results:

    • Older adults showed no significant differences in synergy indices or EEG beta band power between conditions.
    • Young adults exhibited lower synergy indices and EEG beta band power in the free condition compared to the fixed condition.
    • Older adults demonstrated reduced synergy indices and EEG beta band power compared to young adults in the fixed condition.

    Conclusions:

    • Older adults maintain consistent finger force control strategies across different task demands.
    • Young adults dynamically adjust their motor control strategies based on task requirements.
    • A potential relationship exists between EEG band power and finger force coordination, suggesting neural underpinnings of motor control adjustments.