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Related Experiment Video

Updated: Sep 6, 2025

Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex
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Electroencephalography, electrocorticography, and cortical stimulation techniques.

Mirela V Simon1, Marc R Nuwer2, Andrea Szelényi3

  • 1Department of Neurology, Massachusetts General Hospital, Boston, MA, United States.

Handbook of Clinical Neurology
|June 30, 2022
PubMed
Summary
This summary is machine-generated.

This chapter details intraoperative electroencephalography (EEG) and electrocorticography (ECoG) for brain activity monitoring and mapping. It covers principles, interpretation, clinical applications, and electrical stimulation techniques for neurosurgery.

Keywords:
ElectrocorticographyElectroencephalographyEpileptogenic zoneMappingMultipulse train paradigmPenfield paradigm

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Area of Science:

  • Neuroscience
  • Neurosurgery
  • Clinical Neurophysiology

Background:

  • Electroencephalography (EEG) and electrocorticography (ECoG) are crucial intraoperative tools.
  • Accurate interpretation of brain activity requires understanding recording methods and anesthetic effects.

Purpose of the Study:

  • To provide a comprehensive overview of EEG and ECoG principles and applications.
  • To detail intraoperative electrical stimulation techniques for functional brain mapping.
  • To differentiate between scalp, surface, and deep cortical recordings for reliable interpretation.

Main Methods:

  • Review of EEG and ECoG principles, recording methodologies, and interpretation in the intraoperative setting.
  • Discussion of clinical applications in epilepsy and non-epilepsy surgeries.
  • Analysis of electrical stimulation parameters and their impact on mapping.

Main Results:

  • Differences between scalp, surface, and deep cortical recordings impact interpretation of electrophysiologic parameters.
  • Electrical stimulation parameters influence safety, seizure propensity, efficiency, and reliability of mapping.
  • Understanding stimulation characteristics is key for accurate functional mapping.

Conclusions:

  • EEG and ECoG are vital for intraoperative neurophysiologic monitoring and mapping.
  • Detailed knowledge of recording techniques and stimulation parameters enhances diagnostic accuracy and surgical planning.
  • This chapter provides essential insights for neurophysiologists and surgeons.