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Fluctuations in visual neglect after stroke?

D Levy1, R A Blizzard, P W Halligan

  • 1Academic Department of Geriatric Medicine, Royal Free Hospital Medical School, London UK.

European Neurology
|January 1, 1995
PubMed
Summary
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Visual neglect in stroke patients typically does not fluctuate significantly throughout the day. A single assessment using the Visual Neglect Recovery Index (VNRI) can effectively identify patients for treatment trials.

Area of Science:

  • Neuroscience
  • Neurology
  • Rehabilitation Medicine

Background:

  • Clinical observations suggest visual neglect in stroke patients fluctuates daily.
  • Potential causes include fatigue, time of day, and patient compensation.
  • Previous studies have not formally assessed the extent of this daily fluctuation.

Purpose of the Study:

  • To formally evaluate the extent of daily fluctuation in visual neglect.
  • To assess the reliability of the Visual Neglect Recovery Index (VNRI) for measuring neglect severity.
  • To determine if VNRI can aid in selecting acute stroke patients for treatment trials.

Main Methods:

  • Twenty-two acute stroke and 19 convalescent stroke patients were assessed.
  • Visual neglect was measured twice on the same day using the VNRI.

Related Experiment Videos

  • Inter-test reliability of the VNRI was calculated.

    • Main Results:

    • The Visual Neglect Recovery Index (VNRI) demonstrated extremely high inter-test reliability.
    • Contrary to clinical expectations, most patients did not exhibit significant fluctuation in visual neglect.
    • The VNRI proved to be a valid and sensitive measure for assessing neglect severity.

    Conclusions:

    • A single assessment of visual neglect using the VNRI may be sufficient for patient selection.
    • The VNRI is a reliable tool for measuring neglect severity in stroke patients.
    • This finding challenges previous assumptions about the dynamic nature of visual neglect.