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Space representation in unilateral spatial neglect.

F Chedru

    Journal of Neurology, Neurosurgery, and Psychiatry
    |November 1, 1976
    PubMed
    Summary

    Patients with unilateral brain lesions show spatial neglect that depends on visual control. This suggests that while inner spatial representation is often intact, vision plays a dominant role in spatial neglect.

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    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Neurology

    Background:

    • Unilateral spatial neglect is a deficit in awareness of one side of space.
    • The role of visual input in spatial neglect is not fully understood.

    Purpose of the Study:

    • To investigate the visual dependency of unilateral spatial neglect.
    • To assess how visual control influences spatial exploration in patients with brain lesions.

    Main Methods:

    • Patients with unilateral brain lesions performed a spatial exploration task.
    • Performance was compared with and without visual control.
    • Patient performance was contrasted with that of neurologically healthy subjects.

    Main Results:

    • Right brain damage without visual field defects led to left-sided neglect only without visual control.
    • Left and right brain damage with visual field defects resulted in contralateral neglect solely under visual guidance.
    • Inner spatial representation appears intact in most spatial neglect cases.

    Conclusions:

    • Visual input significantly influences spatial neglect, particularly in patients with specific brain damage and visual field defects.
    • The parietal lobe may play a role in visually induced spatial neglect.
    • Vision's dominant role in sensory processing is highlighted.

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