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🔌Overview

Intracranial EEG · Electrocorticography and depth electrodes — millimetre-scale human recordings that reveal high-frequency dynamics surgery can see.

Reviewed 2026-08·Sources & research·Methodology·Media credits

iEEG sits at the intersection of epilepsy surgery and cognitive neuroscience: clinical necessity enables millimetre–millisecond human data.

This page maps promises and hard limits without selling consumer brain implants.

Pillars

Clinical mapping

Localise seizure onset and eloquent cortex.

High-frequency dynamics

High-gamma and ripple-band windows onto population activity.

Task neuroscience

Perception, language and memory paradigms in surgical patients.

Ethical constraints

Sparse coverage, consent and no healthy-volunteer implant.

Key facts

Spatial scale

Millimetres near cortical generators.

Temporal bandwidth

Kilohertz sampling captures high-gamma.

ECoG vs SEEG

Surface grids versus depth trajectories.

Clinical first

Research piggybacks on indicated monitoring.

Sparse sampling

Electrodes follow surgical plans, not whole-brain maps.

Decoding limits

Task-linked signals ≠ reading private thoughts.

Pair with Epilepsy, Language, Motor Control and Methods neighbours.

Sources & research

  1. Promises and limitations of human intracranial electroencephalographyParvizi J; Kastner S · 2018 · Nature NeurosciencePromises and limits of human iEEG.DOI
  2. High-frequency neural activity and human cognition: past, present and possible future of intracranial EEG researchLachaux JP; et al. · 2012 · Progress in NeurobiologyHigh-frequency activity and cognition review.DOI
  3. High-frequency gamma oscillations and human brain mapping with electrocorticographyCrone NE; et al. · 2006 · Progress in Brain ResearchHigh-gamma mapping with ECoG.DOI

Media credits

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