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Related Concept Videos

Motor and Sensory Areas of the Cortex01:14

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The cerebral cortex, the brain's outermost layer, is pivotal in processing complex cognitive tasks, emotions, and various sensory inputs and executing voluntary motor activities. This intricate structure is divided into three primary functional areas: the motor areas, sensory areas, and association areas.
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The direct motor pathways, also known as the pyramidal tracts, are a group of neural pathways that originate in the brain and descend through the spinal cord. They control the voluntary movement of the body. There are two major direct motor pathways: the corticospinal and the corticobulbar tracts.
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Related Experiment Video

Updated: Apr 18, 2026

Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation
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Motor task-based differences in brain networks: preliminary results.

Da-Hye Kim, Wanjoo Park, Yun-Hee Kim

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |January 9, 2015
    PubMed
    Summary

    Brain network activity during upper limb movements differs between active tasks and motor imagery. This study found significant differences in brain network centrality and small-worldness in stroke patients, particularly in the high beta frequency band.

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    Electroencephalography Network Indices as Biomarkers of Upper Limb Impairment in Chronic Stroke
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    Electroencephalography Network Indices as Biomarkers of Upper Limb Impairment in Chronic Stroke
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    Area of Science:

    • Neuroscience
    • Biomedical Engineering
    • Rehabilitation Science

    Background:

    • Understanding brain network dynamics is crucial for stroke rehabilitation.
    • Previous research has explored brain activity during motor tasks, but task-specific network differences require further investigation.

    Purpose of the Study:

    • To compare brain network characteristics during active upper limb grasp movements versus motor imagery in chronic stroke patients.
    • To investigate the influence of different motor tasks on brain network properties in the high beta frequency band.

    Main Methods:

    • Electroencephalography (EEG) signals were recorded from 4 chronic stroke patients during active and motor imagery tasks.
    • Network analysis techniques, including centrality and small-worldness (SW), were applied to EEG data.
    • Analysis focused on the high beta frequency band (21-30 Hz) within motor cortices of the affected hemisphere.

    Main Results:

    • A statistically significant difference in centrality was observed between active and motor imagery tasks in the motor cortices of the affected hemisphere within the high beta band.
    • Small-worldness (SW) decreased during the active task compared to the motor imagery task in the high beta band.

    Conclusions:

    • Brain networks exhibit distinct characteristics depending on the type of motor task performed, both in terms of frequency and temporal dynamics.
    • These findings provide evidence for task-dependent alterations in brain network organization following stroke.