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Related Experiment Videos

Predicting performance from functional imaging data: methods matter.

John J Sidtis1, Stephen C Strother, David A Rottenberg

  • 1Geriatrics Division, Nathan Kline Institute, Orangeburg, NY, 10962, USA. john.sidtis@nyu.edu

Neuroimage
|October 22, 2003
PubMed
Summary
This summary is machine-generated.

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Functional imaging studies may not accurately reflect brain activity related to performance. Contrasting brain states does not always isolate relevant neural processes for predicting behavior.

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Medical Imaging

Background:

  • Functional imaging commonly contrasts brain states to infer brain-behavior relationships.
  • Assumptions include that relative signal change reflects involvement and magnitude indicates importance.

Purpose of the Study:

  • To investigate if functional imaging data can predict behavioral performance.
  • To re-evaluate common assumptions in functional neuroimaging analysis.

Main Methods:

  • Positron emission tomography (PET) measured regional cerebral blood flow in 13 participants during speech production and quiet rest.
  • Analyzed relationships between different imaging measures and speech task performance.

Main Results:

Related Experiment Videos

  • Measures from "activated" scans predicted speech rate, but contrasts between "baseline" and "activated" states did not.
  • Speech rate was predicted by a combination of two regions, neither with the highest activation, one negatively correlated.

    • Conclusions:

    • Contrasting experimental conditions may not effectively isolate brain activity predictive of performance.
    • Current assumptions regarding activation in functional imaging require reconsideration.