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Related Experiment Videos

Left visual spatial neglect is both environment-centered and body-centered.

R Calvanio, P N Petrone, D N Levine

    Neurology
    |July 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

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    This study investigated spatial neglect after right hemisphere stroke. Findings suggest that brain hemispheres direct attention using both body-centered and environment-centered reference frames.

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Neurology

    Background:

    • Right hemisphere lesions often cause spatial neglect, a deficit in awareness of the left side.
    • The reference frame (body-centered vs. environment-centered) for this neglect is debated.

    Purpose of the Study:

    • To determine if spatial neglect is body-centered or environment-centered.
    • To investigate the role of reference frames in attention after stroke.

    Main Methods:

    • Patients with right hemisphere stroke and healthy controls identified objects/words in spatial arrays.
    • Tasks were performed in seated and side-reclining positions to decouple body and environmental axes.

    Main Results:

    • Patients showed reduced reporting to the left, regardless of body position.

    Related Experiment Videos

  • This effect was observed for both body-left and environment-left neglect.

    • Conclusions:

    • Cerebral hemispheres likely use multiple reference frames for attention.
    • Attention is directed relative to both the body midline and environmental axes.