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"Hyperneglect", a sequential hemispheric stroke syndrome

J Ghika1, J Bogousslavsky, F Regli

  • 1Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland.

Journal of the Neurological Sciences
|October 1, 1995
PubMed
Summary
This summary is machine-generated.

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Stroke patients exhibited "hyperneglect," a unique behavior of actively turning away from stimuli in their neglected space. This transient syndrome, linked to frontal or parietal lobe strokes, involved extreme axial rotation and extension.

Area of Science:

  • Neurology
  • Neuroscience
  • Clinical Medicine

Background:

  • Hemineglect is a common deficit following stroke.
  • Patients typically ignore stimuli in the neglected hemispace.

Purpose of the Study:

  • To describe a novel behavioral syndrome observed in stroke patients with hemineglect.
  • To introduce and define the term "hyperneglect".

Main Methods:

  • Case study of 8 patients with stroke and hemineglect.
  • Clinical observation of patient behavior and response to stimuli.
  • Computed tomography (CT) scans to assess brain lesions.

Main Results:

  • Patients displayed transient, active repulsion from stimuli in the neglected hemispace.

Related Experiment Videos

  • This behavior intensified with stimulation, causing >180-degree rotation and opisthotonos-like extension.
  • CT revealed sequential hemispheric strokes or large unilateral infarcts with associated pathologies.

    • Conclusions:

    • "Hyperneglect" represents a distinct, transient behavioral syndrome in acute stroke.
    • The syndrome may involve heightened neglect or a release of active repellent behavior from parietal lesions.
    • Association with acute frontal/parietal strokes and prior lesions suggests complex neural network involvement.