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Behavioral abnormalities after right hemisphere stroke.

D B Hier, J Mondlock, L R Caplan

    Neurology
    |March 1, 1983
    PubMed
    Summary
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    Right hemisphere strokes can cause various impairments, including spatial neglect and motor impersistence. Parietal lobe injury is key for constructional apraxia and unilateral spatial neglect on drawing, while larger strokes affect motor impersistence and anosognosia.

    Area of Science:

    • Neuroscience
    • Neurology
    • Cognitive Psychology

    Background:

    • Right hemisphere strokes can lead to a range of neurological deficits.
    • Understanding the relationship between lesion location and specific behavioral impairments is crucial for patient care and rehabilitation.

    Purpose of the Study:

    • To investigate the correlations between various neurological deficits following unilateral right hemisphere strokes.
    • To identify the specific brain regions associated with distinct behavioral abnormalities.

    Main Methods:

    • Evaluation of 41 patients with unilateral right hemisphere strokes.
    • Assessment of hemiparesis, hemianopia, constructional apraxia, neglect, extinction, unilateral spatial neglect on drawing (USND), dressing apraxia, anosognosia, prosopagnosia, and motor impersistence.

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  • Correlation analysis between observed deficits and lesion locations.

    • Main Results:

    • Low correlations were observed between USND, neglect, and extinction.
    • Constructional apraxia showed a stronger correlation with USND than with hemianopia.
    • Motor impersistence and anosognosia correlated with hemiplegia severity and were associated with large strokes.
    • Right parietal lobe injury was linked to USND and constructional apraxia.
    • Motor impersistence, left neglect, and anosognosia often involved injury beyond the parietal lobe.
    • Small deep lesions mimicked behavioral deficits of larger cortical lesions.

    Conclusions:

    • Right parietal lobe lesions are significant for USND and constructional apraxia.
    • Motor impersistence, left neglect, and anosognosia are associated with extensive right hemisphere damage.
    • Lesion size and location critically influence the manifestation of post-stroke behavioral deficits.