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Related Experiment Videos

Cerebral perfusion in progressive supranuclear palsy.

K A Johnson1, R A Sperling, B L Holman

  • 1Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts 02115.

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
|May 1, 1992
PubMed
Summary

Progressive supranuclear palsy (PSP) patients show reduced brain activity in key areas like the basal ganglia and frontal cortex. [123I] iofetamine (IMP) SPECT imaging reveals these functional changes, correlating with cognitive deficits.

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Area of Science:

  • Neuroscience
  • Radiology

Background:

  • Progressive supranuclear palsy (PSP) is a neurodegenerative disease.
  • PSP is characterized by functional disconnection of the cerebral cortex due to subcortical lesions.

Purpose of the Study:

  • To assess brain functional activity in PSP patients using [123I] iofetamine (IMP) and single-photon emission computed tomography (SPECT).
  • To correlate functional brain changes with cognitive performance in PSP.

Main Methods:

  • 11 PSP patients and 10 healthy controls underwent IMP-SPECT imaging.
  • IMP uptake was measured in basal ganglia and 24 cortical regions.
  • Neuropsychological tests assessed cognitive function.

Main Results:

  • PSP patients exhibited significantly reduced relative IMP uptake in basal ganglia (21%), superior frontal (25%), anterior parietal (19%), and inferior frontal (18%) regions compared to controls.

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  • Cognitive impairments were most pronounced in tests associated with frontal lobe function.

    • Conclusions:

    • IMP-SPECT imaging effectively detects physiological abnormalities in the cerebral cortex of PSP patients.
    • These functional brain changes detected by IMP-SPECT correlate with observed behavioral and cognitive impairments in PSP.