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TASK-RELATED VERSUS RESTING-STATE BRAIN OSCILLATIONS DURING MOTOR LEARNING IN HEALTHY OLDER ADULTS
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1
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| Subject:
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Personalized Interventions and Diagnosis of Complex Neurological Disorders
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Presenter Author:
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| Name:
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MohaddesehSadat HafezYousefi
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Author:
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| Name 1:
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MohaddesehSadat HafezYousefi - Corresponding - Presenter
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| Affiliation 1:
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Department Physiotherapy School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran.
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Abstract
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Original Research
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introduction :
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Aging is associated with changes in motor learning capacity and cortical oscillatory activity. While electroencephalographic (EEG) correlates of motor learning have been extensively studied, less is known about how neural oscillations differ between resting and task-related conditions during motor learning in older adults.
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Methods:
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Thirty-eight older adults (age 60–75 years; MMSE 21–24) were randomly assigned to a-tPCS (n=19) and sham (n=19) groups. Stimulation (2 mA, 20 min) was applied to the left M1 during five daily sessions of a serial reaction time task (SRTT). Absolute and relative EEG spectral power (theta, alpha, beta) was measured at baseline in resting and task-related conditions, after five intervention sessions, and at two-week follow-up.
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Results:
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Distinct state-dependent patterns of brain oscillatory activity were observed. Task-related EEG was characterized by differential modulation of alpha, beta, and theta power compared with resting-state recordings, and these differences became more pronounced during training sessions. Changes in task-related oscillatory activity were more strongly associated with motor learning performance than were resting-state EEG measurements (p<0.001).
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Conclusion:
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Task-related EEG appears to be more sensitive to learning-related neural plasticity than resting-state measures, emphasizing the importance of brain state when interpreting EEG markers of motor learning in older adults.
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| Attachment:
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| Keywords:
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resting-state , task-related conditions, electroencephalographic, aging
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