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Related Experiment Videos

Pain suppresses spontaneous brain rhythms.

Markus Ploner1, Joachim Gross, Lars Timmermann

  • 1Department of Neurology, Heinrich-Heine-University, 40225 Düsseldorf, Germany. ploner@neurologie.uni-duesseldorf.de

Cerebral Cortex (New York, N.Y. : 1991)
|July 22, 2005
PubMed
Summary

Pain globally suppresses brain oscillations in sensory and motor areas, indicating widespread changes in cortical function. This global effect may serve an alerting function, prioritizing survival-relevant stimuli.

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Area of Science:

  • Neuroscience
  • Brain Activity
  • Pain Perception

Background:

  • Resting human brain activity features spontaneous oscillations in sensory and motor regions.
  • Oscillatory amplitude correlates with functional states: higher amplitude suggests idling, lower amplitude indicates activation and excitability.

Purpose of the Study:

  • To investigate the impact of pain on spontaneous brain rhythms using magnetoencephalography (MEG).

Main Methods:

  • Magnetoencephalography (MEG) was employed to measure brain activity.
  • A focal, brief painful stimulus was applied to participants.

Main Results:

  • A painful stimulus globally suppressed spontaneous oscillations across somatosensory, motor, and visual areas.

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  • This widespread suppression contrasts with localized changes seen in other sensory modalities.
  • Results indicate a global alteration in cortical function and excitability induced by pain.

    • Conclusions:

    • Pain induces a global change in cortical excitability, not just localized effects.
    • This global effect likely supports pain's alerting function, facilitating responses to significant stimuli.