ECoG grids / strips
Surface sampling for mapping and research.
Darker cells mean a higher score for this topic on that metric.
Research82
Awareness45
Complexity85
Clinical weight75
Plasticity40
Live debate60
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Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
What is intracranial EEG iEEG/ECoG?
Electrodes on or in the brain during clinical mapping — millimetre-scale timing that scalp EEG blurs. Teaching description of published methods.
When did Penfield-era cortical stimulation map speech?
Mid-20th-century Montreal work made awake mapping famous. Modern grids and stereo-EEG continue the classroom story without copying an OR checklist.
Is this a guide to implant surgery or dosing?
No. Educational methods atlas. Not a diagnosis, implant protocol, or medication dose.
What can iEEG resolve that scalp methods smear?
When and where populations engage during perception, speech, memory or movement — at scales scalp EEG averages away.
Research score 82 — a clinic ranking?
No. Editorial 0-100 in this methods field. Compare with EEG, fMRI and MEG neighbours.
Why do overview pages get clicks?
They name ECoG sites and cortical surface mapping early. Keep reading Overview, Anatomy, Function; do not self-schedule a procedure.
Methods include implantation planning, continuous video-EEG, cortical stimulation, high-gamma analytics and careful statistics under sparse sampling.
Triangulate with imaging and behaviour; do not overclaim from a few contacts.
Tools
SEEG depth electrodes
3D network coverage with smaller openings.
Video-EEG monitoring units
Capture seizures with behavioural context.
Cortical stimulation systems
Causal mapping of language and motor function.
High-gamma / time-frequency toolkits
Extract task-related broadband power.
MRI co-registration
Locate contacts in individual anatomy.
Protocols
Pre-implant multimodal conference
Align hypotheses before electrode placement.
Ictal onset review boards
Consensus reading of seizure starts.
Cognitive task batteries (optional)
Only when clinically compatible and consented.
Sham / control contrasts in research
Guard against arousal confounds in high-gamma.
Limits
Sampling bias
Clinical targets ≠ random brain coverage.
Pathology confounds
Epileptic tissue may alter “normal” dynamics.
Generalisation limits
Findings from few patients need replication.
Preregister cognitive analyses when possible; clinical care comes first.
Sources & research
- Promises and limitations of human intracranial electroencephalographyPromises and limits of human iEEG.DOI
- High-frequency neural activity and human cognition: past, present and possible future of intracranial EEG researchHigh-frequency activity and cognition review.DOI
- High-frequency gamma oscillations and human brain mapping with electrocorticographyHigh-gamma mapping with ECoG.DOI
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