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Unilateral neglect: personal and extra-personal.

E Bisiach, D Perani, G Vallar

    Neuropsychologia
    |January 1, 1986
    PubMed
    Summary
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    Right brain damage can cause unilateral neglect in personal and extra-personal space. Findings suggest spatial reference for neglect is not unitary, possibly reflecting personal versus extra-personal space differences.

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Neurology

    Background:

    • Unilateral neglect is a common deficit following brain damage, particularly to the right hemisphere.
    • This condition affects awareness of stimuli on the contralateral side of space.
    • Neglect can manifest in personal space (body-related) and extra-personal space (external environment).

    Purpose of the Study:

    • To investigate the frequency and patterns of unilateral neglect in personal versus extra-personal space.
    • To examine the association between these two forms of neglect.
    • To explore the relationship between unilateral neglect and other neurological disorders.

    Main Methods:

    • Ninety-seven patients with right brain damage were assessed.
    • Two tasks were administered to evaluate neglect in personal and extra-personal space.

    Related Experiment Videos

  • Data on the frequency and co-occurrence of neglect aspects were analyzed.

    • Main Results:

    • The study reports the frequency of neglect in personal and extra-personal space.
    • Patterns of association between personal and extra-personal neglect are detailed.
    • Relationships with elementary neurological disorders are discussed.

    Conclusions:

    • Results suggest unilateral neglect may not rely on a single spatial reference frame.
    • A dichotomy between personal and extra-personal spatial processing is proposed.
    • This distinction may offer a framework for understanding unilateral neglect subtypes.