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Related Experiment Videos

Unilateral neglect, representational schema and consciousness.

E Bisiach, C Luzzatti, D Perani

    Brain : a Journal of Neurology
    |September 1, 1979
    PubMed
    Summary

    Patients with right brain damage and unilateral neglect struggle to detect visual differences on the left side of mental images. This suggests a representational disorder is key to understanding unilateral neglect and conscious brain activity.

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    Area of Science:

    • Neuroscience
    • Cognitive Psychology

    Background:

    • Unilateral neglect is a cognitive disorder often resulting from right brain damage.
    • It affects spatial awareness and attention, particularly towards the left side of space.

    Purpose of the Study:

    • To investigate the role of representational disorders in unilateral neglect.
    • To explore how visual processing is affected in patients with unilateral neglect.

    Main Methods:

    • Right brain-damaged patients with unilateral neglect performed a visual detection task.
    • Participants identified differences in leftward and rightward moving patterns viewed through a vertical slit.

    Main Results:

    • Detection of differences was significantly impaired when they occurred on the left side of mentally reconstructed images.
    • This impairment was observed regardless of the direction of pattern movement.

    Conclusions:

    • A representational disorder, affecting the mental manipulation of spatial information, likely plays a primary role in unilateral neglect.
    • Findings have implications for understanding conscious brain activity and spatial representation.

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