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Related Experiment Videos

Episodic multiregional cortical coherence at multiple frequencies during visual task performance

S L Bressler1, R Coppola, R Nakamura

  • 1Center for Complex Systems, Florida Atlantic University, Boca Raton 33431.

Nature
|November 11, 1993
PubMed
Summary
This summary is machine-generated.

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The brain

Area of Science:

  • Neuroscience
  • Cognitive Science
  • Computational Neuroscience

Background:

  • The brain's binding problem addresses how disparate neural events integrate into unified perceptions and behaviors.
  • Gamma-band oscillations (30-80 Hz) are hypothesized to mediate neural synchrony for binding.
  • Previous studies show gamma-correlation in olfactory and visual systems, but findings in primate cortex are mixed.

Purpose of the Study:

  • To investigate the neural mechanisms underlying the binding problem in primate perceptuomotor behavior.
  • To determine if broad-band synchronization, rather than narrow-band gamma oscillations, underlies interregional cortical binding.

Main Methods:

  • Recorded local field potentials from sensory, motor, and higher-order cortical sites in macaque monkeys.

Related Experiment Videos

  • Monitored neural activity during a visual discrimination task.
  • Analyzed broad-band coherence and synchronization patterns across distributed cortical areas.

    • Main Results:

    • Observed episodes of increased broad-band coherence among widely distributed cortical sites.
    • Demonstrated that these synchronized sites could become coherent without involving intervening areas.
    • Found that broad-band synchronization occurred during perceptuomotor behavior.

    Conclusions:

    • Broad-band synchronization, not exclusively gamma oscillations, may facilitate spatially selective, multiregional cortical binding.
    • This broad-band synchronization mechanism could be crucial for primate perceptuomotor behavior.
    • The findings suggest a more flexible and widespread neural synchrony mechanism for integrating information across the primate brain.