Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Task-specific deactivation patterns in functional magnetic resonance imaging.

M Hutchinson1, W Schiffer, S Joseffer

  • 1Department of Neurology, New York University School of Medicine, NY 10016, USA. michael.hutchinson@med.nyu.edu

Magnetic Resonance Imaging
|December 28, 1999
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Black Hole Spectroscopy and Tests of General Relativity with GW250114.

Physical review letters·2026
Same author

The Ruminant Farm Systems (RuFaS) model is a platform to support future research and actions for sustainable dairy farming.

JDS communications·2026
Same author

Radiomic signatures to estimate survival in patients with advanced hepatocellular carcinoma treated with sorafenib: Cancer and Leukemia Group B 80802 (Alliance).

ESMO open·2025
Same author

Adverse events associated with sequential immune checkpoint inhibitor and alectinib in patients with ALK-rearranged advanced non-small-cell lung cancer.

ESMO open·2025
Same author

GW250114: Testing Hawking's Area Law and the Kerr Nature of Black Holes.

Physical review letters·2025
Same author

Unifying measurement schemes in 2D terahertz spectroscopy.

The Journal of chemical physics·2025

This study reveals that brain deactivations during cognitive tasks are genuine physiological signals, not artifacts or reference state activation. These task-specific deactivations are crucial for understanding neural networks.

Area of Science:

  • Neuroimaging
  • Cognitive Neuroscience
  • Functional Magnetic Resonance Imaging (fMRI)

Background:

  • fMRI analysis traditionally focuses on brain activation (increased signal intensity).
  • Recent research indicates significant brain deactivation during cognitive tasks.
  • The physiological basis and interpretation of these deactivations remain unclear.

Purpose of the Study:

  • To investigate the relationship between the reference state and observed brain deactivations.
  • To determine if deactivations are genuine neural signals or artifacts.
  • To characterize task-specific deactivation patterns.

Main Methods:

  • Utilized univariate analysis and echo-planar fMRI.
  • Employed two covert tasks: orthographic lexical retrieval and pure visual retrieval.

Related Experiment Videos

  • Used silent counting as the reference (baseline) state.

    • Main Results:

    • Identified extensive, task-specific regional increases and decreases in signal intensity.
    • Demonstrated that decremental responses (deactivations) are not caused by reference state activation.
    • Showed deactivations are not an artifact of the image analysis process.

    Conclusions:

    • Task-specific brain deactivations represent a physiological signal.
    • Deactivations are an integral component of neural networks underlying brain function.
    • These findings necessitate a re-evaluation of fMRI analysis to include deactivations.