EEG Technology Explorer
An interactive guide to the technologies behind electroencephalography (EEG), exploring electrodes, placement systems, invasiveness, brainwave visualization, and real-world applications.
Part I: The Electrode-Tissue Interface
This section explores the fundamental component of any EEG system: the electrode. The design and material of an electrode profoundly influence data quality. Select an electrode type below to learn about its characteristics and see how it compares to others.
Part II: Electrode Placement Systems
Reproducibility in EEG relies on standardized placement. This section details the international systems that ensure electrodes are placed consistently. These systems use proportional head measurements, adapting to individual variations.
Part III: A Spectrum of Invasiveness
The proximity of an electrode to the brain dictates signal quality, but at a cost. This section explores the spectrum of recording methods, from safe scalp EEG to invasive techniques that record from within the brain, highlighting the fundamental trade-off between signal fidelity and surgical risk.
Comparing Modalities: Key Metrics
This chart provides a direct comparison of different recording modalities across key performance and risk indicators. Notice the step-like gains in information quality as invasiveness increases. Hover over the bars for specific values.
Head-to-Head: SEEG vs. Subdural Grids (SDE)
For epilepsy surgery planning, the choice between SEEG and SDE is critical. Recent evidence from a large international registry directly compares these two invasive techniques, revealing significant differences in safety and effectiveness.
Part IV: Visualizing Brain Rhythms
This section provides a dynamic visualization of the different brain wave frequencies captured by EEG. These rhythms are the building blocks of EEG analysis and are associated with different mental states. Press 'Play Demo' to see them in action.
Part V: EEG in Action: Applications
The choice of EEG technology is driven by its intended use. This section explores how different modalities are applied in real-world contexts, from clinical diagnostics to cutting-edge research and consumer products. Select an area to see which technologies are most relevant.
Extended Audio Guide
Listen to an extended audio guide for a deeper understanding of EEG technologies and their applications.
Download the Full Report
For a comprehensive overview of EEG technologies, download the full report in PDF format. This document includes detailed explanations, references, and additional insights.