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Related Experiment Videos

Electrocorticographic coherence patterns.

V L Towle1, R K Carder, L Khorasani

  • 1Department of Neurology, Pritzker School of Medicine, The University of Chicago, Illinois 60637, USA.

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
|December 22, 1999
PubMed
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Electrocorticography (ECoG) coherence patterns reveal reliable brain activity. Analysis of these patterns helps identify brain anatomy, detect tumors or epilepsy, and understand cognition and behavior.

Area of Science:

  • Neuroscience
  • Electrophysiology
  • Brain Imaging

Background:

  • Implantable subdural electrode arrays enable systematic electrocorticographic (ECoG) coherence studies.
  • Previous research has explored coherence patterns in the human cortex.

Purpose of the Study:

  • To review existing ECoG coherence studies.
  • To present original human clinical data on coherence patterns.
  • To describe a method for distinguishing reliable coherence values and explore their relationship with cortical anatomy and pathology.

Main Methods:

  • Review of human ECoG coherence studies.
  • Presentation of original human clinical data.
  • Development and application of a data-driven technique to assess coherence reliability.

Related Experiment Videos

  • Analysis of coherence magnitude and phase in relation to cortical anatomy (e.g., central sulcus).
  • Examination of altered coherence patterns in cases of tumors and epilepsy.

    • Main Results:

    • Reliable and characteristic ECoG coherence patterns were identified.
    • A technique was developed to differentiate reliable from unreliable coherence and phase values.
    • Relationships between coherence and cortical anatomy, including sulcal depth, were revealed.
    • Alterations in coherence patterns associated with tumors and epilepsy were described.
    • Electrophysiologic/pathologic correlations suggested at least two types of epileptic abnormalities.

    Conclusions:

    • ECoG coherence analysis provides insights into cortical functional relationships.
    • Coherence patterns can help identify normal and pathological brain activity, including epilepsy.
    • The study introduces the link between coherence patterns, behavior, and cognition.