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Task Interruption and Resumption Paradigm for Testing the Activation and Pursuit of an Abstract Thinking Goal
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Published on: April 18, 2017

Searching for activations that generalize over tasks.

G L Shulman1, M Corbetta, J A Fiez

  • 1Department of Neurology and Neurological Surgery, Washington University School of Medicine, St. Louis, Missouri 63110, USA.

Human Brain Mapping
|April 22, 2010
PubMed
Summary
This summary is machine-generated.

This study analyzed positron emission tomography (PET) data, finding consistent blood flow changes in the visual cortex during active tasks. These findings suggest selective processing mechanisms in the brain during visual information processing.

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Transferring Cognitive Tasks Between Brain Imaging Modalities: Implications for Task Design and Results Interpretation in fMRI Studies
10:09

Transferring Cognitive Tasks Between Brain Imaging Modalities: Implications for Task Design and Results Interpretation in fMRI Studies

Published on: September 22, 2014

Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Brain Imaging

Background:

  • Positron emission tomography (PET) is a key neuroimaging technique for studying brain function.
  • Previous PET studies have investigated human visual information processing with varying results.
  • Understanding consistent patterns of brain activity is crucial for mapping cognitive functions.

Purpose of the Study:

  • To reanalyze nine previous PET studies on visual information processing.
  • To identify consistent patterns of cerebral blood flow changes during active tasks compared to passive viewing.
  • To determine the reliability of brain activity modulations in specific regions.

Main Methods:

  • Meta-analysis of nine existing PET studies.
  • Comparison of brain blood flow data during active visual tasks versus passive viewing.
  • Statistical analysis to identify consistently modulated brain regions.

Main Results:

  • Consistent blood flow increases were observed in the early visual cortex (including area 17).
  • Blood flow decreases were noted in some auditory and somatosensory areas, not indicating broad subcortical suppression.
  • Consistent increases were found in the thalamus and cerebellum, while many cortical areas showed decreases.

Conclusions:

  • Early visual cortex activity is consistently modulated during active visual tasks, suggesting selective processing.
  • Brain activity patterns outside the primary sensory cortex are complex, with both increases and decreases observed.
  • Thalamus and cerebellum show reliable blood flow increases, highlighting their role in visual information processing.