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Related Experiment Videos

Dissociated neglect behavior following sequential strokes in the right hemisphere.

K R Daffner1, G L Ahern, S Weintraub

  • 1Bullard and Denny-Brown Laboratories, Division of Behavioral Neurology and Neuroscience, Harvard Neurology Department, Beth Israel Hospital, Boston, MA 02215.

Annals of Neurology
|July 1, 1990
PubMed
Summary

This case study reveals how sequential right hemisphere strokes in a 42-year-old woman illuminated the brain network for spatial attention. Damage to the frontal and parietal lobes sequentially impaired motor and sensory aspects of attention, supporting a distributed network model.

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Area of Science:

  • Neuroscience
  • Cognitive Neurology
  • Neuropsychology

Background:

  • The neural basis of directed attention, particularly its spatial distribution, is thought to involve a distributed network within the brain.
  • Understanding the specific roles of different brain regions in attention is crucial for diagnosing and treating attentional disorders.

Observation:

  • A 42-year-old woman experienced two sequential strokes affecting the right cerebral hemisphere.
  • The first stroke, in the right frontal lobe, caused left hemi-spatial neglect primarily affecting exploratory-motor attention tasks.
  • A subsequent stroke in the right parietal lobe, occurring 20 days later, led to the development of perceptual-sensory aspects of neglect.

Findings:

  • The patient's sequential strokes progressively impaired different facets of spatial attention.

Related Experiment Videos

  • The frontal lobe lesion impacted the motor components of directed attention.
  • The parietal lobe lesion affected the sensory components of directed attention.

    • Implications:

    • This case provides strong evidence for a distributed anatomical-functional network underlying directed spatial attention.
    • The findings highlight the distinct yet interconnected roles of the frontal and parietal lobes in attentional processing.
    • Understanding this network is vital for advancing treatments for spatial neglect and other attention disorders.