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Spinal Cord01:26

Spinal Cord

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The spinal cord, a critical component of the central nervous system, extends from the base of the brainstem to the lumbar region of the vertebral column. It is essential for maintaining physical stability and facilitating communication between the brain and peripheral parts of the body.
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The Spinal Cord01:54

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The spinal cord is the body’s major nerve tract of the central nervous system, communicating afferent sensory information from the periphery to the brain and efferent motor information from the brain to the body. The human spinal cord extends from the hole at the base of the skull, or foramen magnum, to the level of the first or second lumbar vertebra.
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The spinal cord is an integral hub for motor and sensory information that enables the brain to communicate with the peripheral nervous system (PNS). This communication consists of relaying sensory data and transmission of motor commands.
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Spinal Cord: Gross Anatomy01:15

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The spinal cord resides within the protective confines of the vertebral column. It is the main pathway for information traveling between the brain and the body. It plays a fundamental role in nearly all bodily functions, from simple reflexes to complex motor movements. The spinal cord begins at the medulla oblongata at the base of the brainstem and extends downward, terminating at the conus medullaris near the first and second lumbar vertebrae. The spinal cord's length in adults is...
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Spinal Cord: Cross-sectional Anatomy01:16

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The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
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Evaluation of Respiratory Muscle Activation Using Respiratory Motor Control Assessment RMCA in Individuals with Chronic Spinal Cord Injury
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A Myoelectric Computer Interface for Reducing Abnormal Muscle Activations after Spinal Cord Injury.

Fabio Rizzoglio, Francesca Sciandra, Elisa Galofaro

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    Summary
    This summary is machine-generated.

    This study introduces a Myoelectric Computer Interface (MCI) to help individuals with spinal cord injury (SCI) regain movement by reducing abnormal muscle activation. The MCI shows promise in improving muscle control and awareness for SCI recovery.

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    Area of Science:

    • Neuroscience
    • Rehabilitation Engineering
    • Biomedical Engineering

    Background:

    • Spinal cord injury (SCI) and other neurological disorders often lead to impaired motor function and abnormal muscle activation patterns.
    • Compensatory strategies and undesired co-contraction can hinder motor recovery after neurological damage.
    • Myoelectric Computer Interfaces (MCIs) offer a potential avenue for restoring movement and improving muscle control.

    Purpose of the Study:

    • To develop and test an MCI designed to reduce abnormal muscular activations, specifically co-contraction and compensatory strategies, in individuals with SCI.
    • To investigate the efficacy of mapping surface electromyographic (sEMG) signals to cursor movement for motor control.
    • To assess the impact of modulated visual feedback on reducing undesired muscle activation.

    Main Methods:

    • Development of an MCI system that translates sEMG signals into cursor movements on a computer monitor.
    • Implementation of strategies to reduce muscle pair co-activation and modulate visual feedback based on third muscle activation.
    • Testing the MCI with six unimpaired participants and two participants with SCI.

    Main Results:

    • Participants demonstrated an ability to decrease targeted muscle activity when linked to visual cursor feedback, though activity increased again after training.
    • One SCI participant successfully reduced arm muscle co-activation.
    • Another SCI participant improved selective leg muscle activation.
    • This study serves as a proof of concept for MCIs enhancing muscle awareness and reducing simultaneous muscle activations in SCI individuals.

    Conclusions:

    • The developed MCI system shows potential for improving motor control and reducing abnormal muscle activation in individuals with SCI.
    • MCIs can enhance proprioceptive feedback, leading to greater awareness of muscular activity.
    • This technology represents a promising tool for rehabilitation after SCI, facilitating better selective muscle control.