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Related Experiment Videos

"Pure" motor hemiplegia.

S Chokroverty, F A Rubino

    Journal of Neurology, Neurosurgery, and Psychiatry
    |September 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Pure motor hemiplegia may involve more than just the corticospinal system. Our study suggests other neurological pathways can also cause this condition, impacting motor function.

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    Area of Science:

    • Neuroscience
    • Neurology
    • Clinical Neurophysiology

    Background:

    • Pure motor hemiplegia is typically associated with corticospinal tract lesions.
    • However, the precise neuroanatomical correlates are not fully elucidated in all cases.

    Purpose of the Study:

    • To investigate the neurophysiological underpinnings of apparently pure motor hemiplegia.
    • To explore potential involvement beyond the corticospinal system.

    Main Methods:

    • Stimulation of the median nerve in hemiplegic limbs.
    • Recording of cerebral evoked responses.

    Main Results:

    • Attenuation of cerebral evoked responses was observed, suggesting broader neural pathway involvement.

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  • Lesions in frontoparietal regions, brainstem (basis pontis, medullary pyramid), and internal carotid artery occlusion were associated with pure motor hemiplegia.

    • Conclusions:

    • Pure motor hemiplegia may result from disruptions in systems beyond the corticospinal tract.
    • These findings highlight the complexity of motor control and the diverse etiologies of hemiplegic presentations.