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Related Experiment Videos

Motor impersistence: a right-hemisphere syndrome.

A Kertesz, I Nicholson, A Cancelliere

    Neurology
    |May 1, 1985
    PubMed
    Summary

    Motor impersistence, the inability to sustain motor actions, is more common in patients with right-sided brain lesions. This finding suggests a link between right-hemisphere function and directed attention required for motor control.

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    Area of Science:

    • Neuroscience
    • Neurology
    • Clinical Psychology

    Background:

    • Motor impersistence is a neurological condition characterized by difficulty maintaining voluntary motor actions.
    • Previous research suggests motor impersistence can occur in various cerebral diseases, but its specific localization is not fully understood.

    Purpose of the Study:

    • To investigate the relationship between focal brain lesions and the occurrence of motor impersistence.
    • To identify specific lesion locations (hemisphere, lobe) associated with increased motor impersistence.

    Main Methods:

    • A standardized clinical test assessing sustained motor actions was administered to patients with acute focal stroke lesions and healthy controls.
    • Patients were matched for age and lesion size.
    • Lesion laterality (right vs. left hemisphere) and location (frontal, central, posterior) were analyzed.

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    Main Results:

    • Patients with right-sided brain lesions exhibited significantly higher levels of motor impersistence compared to those with left-sided lesions.
    • Specific tasks like sustained eye closure, mouth opening, tongue protrusion, and leftward gaze were most sensitive to impersistence.
    • Right central and frontal lesions were most strongly associated with motor impersistence.

    Conclusions:

    • Motor impersistence is a significant sign of right-hemisphere lesions, particularly in the central and frontal regions.
    • The findings suggest that motor impersistence may be related to attentional mechanisms crucial for sustaining motor activity.
    • This study highlights the importance of assessing motor impersistence in patients with right-hemisphere strokes.