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Related Experiment Videos

Verbal asomatognosia.

T E Feinberg1, L D Haber, N E Leeds

  • 1Department of Neurology, Mount Sinai School of Medicine, New York, NY.

Neurology
|September 1, 1990
PubMed
Summary
This summary is machine-generated.

This study identifies the brain regions responsible for verbal asomatognosia, a condition where patients deny limb ownership after stroke. Damage to the right supramarginal gyrus and posterior corona radiata is linked to this specific neurological deficit.

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Area of Science:

  • Neuroscience
  • Neurology
  • Cognitive Psychology

Background:

  • Verbal asomatognosia is a neurological condition characterized by the denial of limb ownership.
  • This syndrome is often associated with brain lesions, particularly in the right hemisphere.
  • Understanding the neuroanatomic basis of verbal asomatognosia is crucial for diagnosis and treatment.

Purpose of the Study:

  • To determine the specific neuroanatomic regions in the brain associated with verbal asomatognosia.
  • To differentiate the brain areas involved in verbal asomatognosia from those involved in general neglect.

Main Methods:

  • Computed tomography (CT) scans of 16 right-hemisphere stroke patients were analyzed.
  • Patients were divided into two groups: 12 with neglect and verbal asomatognosia, and 4 with neglect but without asomatognosia.

Related Experiment Videos

  • 16 cortical and subcortical brain regions were systematically examined for lesion involvement.

    • Main Results:

    • The supramarginal gyrus and posterior corona radiata were consistently implicated in patients with verbal asomatognosia.
    • These specific regions were spared in patients who exhibited neglect but not verbal asomatognosia.
    • Findings support previous localizations of asomatognosia to the right supramarginal gyrus and thalamoparietal peduncle.

    Conclusions:

    • Damage to the right supramarginal gyrus and its subcortical connections is critical for the development of verbal asomatognosia.
    • These findings highlight the specific neural substrates underlying the denial of limb ownership in stroke patients.
    • Further research, including studies on area PF, may be necessary to fully understand limb neglect.