A Proposed Stereoelectroencephalography Electrode Nomenclature and Call for Standardization

Area of Science:

• Neurosurgery
• Epileptology
• Medical Imaging

Background:

• Pharmacoresistant epilepsy affects 20-40% of patients.
• Stereoelectroencephalography (sEEG) is crucial for seizure localization in surgical candidates.
• Current sEEG electrode nomenclature lacks standardization, hindering interpretation and communication.

Purpose of the Study:

• To introduce a novel, intuitive, and comprehensive sEEG nomenclature.
• To address challenges in electrode identification and labeling.
• To improve standardization across epilepsy surgery centers.

Main Methods:

• Developed a nomenclature considering entry/target locations, laterality, depth, and proximity.
• Applied the nomenclature to 41 consecutive sEEG cases (497 electrodes).
• Assessed accuracy by independent neurosurgeons and epileptologists.

Main Results:

• Achieved 100% accuracy in electrode identification.
• Demonstrated 98% accuracy in using correct entry-target labels.
• Showed 100% correct label usage in the last 30 cases.

Conclusions:

• The proposed sEEG nomenclature is highly accurate and consistently used.
• This model facilitates standardization in epilepsy surgery centers.
• Future collaboration aims to enhance practicability and specificity.