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Related Experiment Video

Updated: Jun 7, 2026

Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
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Simultaneous sampling of both cingulate gyri using a single interhemispheric depth electrode: A technical note.

Sahar Farhat1, Jawad Melhem1, Houssein Darwish2

  • 1Department of Neurology, American University of Beirut Medical Center, Beirut, Lebanon.

Surgical Neurology International
|August 7, 2024
PubMed
Summary

Simultaneous depth electrode placement in the cingulate gyri is feasible for epilepsy treatment. Anatomical variations in the falx cerebri influence electrode positioning, impacting anterior and middle cingulate gyrus sampling.

Keywords:
Cingulate gyrusDepth electrodeEpilepsyFalx cerebriSamplingStereoelectroencephalography

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Area of Science:

  • Neurosurgery
  • Epileptology
  • Neuroanatomy

Background:

  • Simultaneous depth electrode sampling of cingulate gyri is clinically valuable for drug-resistant epilepsy.
  • The precise anatomical regions (anterior, middle, posterior) of the cingulate gyrus accessible via a single electrode remain unclear.

Purpose of the Study:

  • To investigate the anatomical relationship between the falx cerebri and cingulate gyrus in adults and children.
  • To determine the feasibility of simultaneous anterior and middle cingulate gyrus sampling using a single depth electrode.

Main Methods:

  • Studied the falx cerebri-cingulate gyrus anatomy in 50 pediatric and adult subjects.
  • Defined an "A line" representing a 5 mm gap for electrode insertion and assessed its location within cingulate gyrus subregions.

Main Results:

  • Significant interindividual and age-related variations (P=0.02) were observed in falx cerebri morphology and its intersection with the corpus callosum.
  • The "A line" fell within the middle cingulate gyrus for 72% of children and 60% of adults.
  • The "A line" was located in the posterior cingulate gyrus for 16% of children and 40% of adults, and anteriorly for 12% of children.

Conclusions:

  • Simultaneous sampling of anterior and middle cingulate gyri is feasible in both pediatric and adult populations.
  • This study highlights significant interindividual variability in falx cerebri morphology and its implications for depth electrode placement.