Knowledge Vault 3/2 - GTEC BCI & Neurotechnology Spring School 2024 - Day 1
How to record EEG with 99% purity index
Francisco Fernandes, g.tec medical engineering GmbH
<Resume Image >

Concept Graph & Resume using Claude 3 Opus | Chat GPT4 | Llama 3:

graph LR classDef gtec fill:#f9d4d4, font-weight:bold, font-size:14px; classDef eeg fill:#d4f9d4, font-weight:bold, font-size:14px; classDef electrodes fill:#d4d4f9, font-weight:bold, font-size:14px; classDef demo fill:#f9f9d4, font-weight:bold, font-size:14px; A[Francisco Fernandes] --> B[Francisco Fernandes: g.tec veteran,
presents hardware/software 1] A --> C[EEG: cortical potentials,
Berger 1924, intricate 2] C --> D[High-quality EEG: grounding,
isolation, setup, maintenance 3] C --> E[EEG caps: fit, contact,
impedance, thresholds 4] C --> F[Amplifiers: connectivity, signal
quality, real-time processing 5] A --> G[EEG devices: large to
compact evolution 6] A --> H[Electrodes: types, 10-20
system placement guide 7] H --> I[Active/dry electrodes: pre-amplify,
reduce noise, setup 8] A --> J[Demo: g.tec products,
electrode type comparison 9] J --> K[Passive demo: abrade, gel,
impedance, suboptimal 10] J --> L[Active demo: gel, no
abrasion, quick 11] J --> M[Wireless dry demo: fast,
adjustable, gel-optional 12] A --> N[Pricing: component-dependent,
Unicorn educational bundle 13] N --> O[Unicorn: neurofeedback, APIs,
real-time access 14] I --> P[Dry troubleshooting: grounding,
noise, clothing, hybrid 15] class A,B gtec; class C,D,E,F eeg; class G,H,I,P electrodes; class J,K,L,M demo;


1.-Francisco Fernandes has worked at g.tec for 10 years. He presents on g.tec's hardware, software, and recording high-quality EEG.

2.-EEG records electrical potentials from the cortex, first measured by Hans Berger in 1924. EEG setups can be complicated.

3.-For high-quality EEG, use proper grounding, isolation, environment, setup, device maintenance, electrode care, and tools for the electrode type.

4.-Use appropriately sized EEG caps. Ensure good electrode placement and scalp contact, especially with hair. Check impedance and voltage thresholds.

5.-Ensure good amplifier connectivity, especially wireless. Maintain signal quality throughout recording. Real-time signal processing is helpful.

6.-EEG devices evolved from large to compact, including g.tec's prototypes, analoG, digital, active, passive, wired and wireless amplifiers.

7.-Electrode types developed include cup, cap-based, active, high-density, dry polymer, and hybrid gel/dry. 10-20 system guides electrode placement.

8.-Active electrodes pre-amplify at the electrode to reduce noise and artifacts. Dry electrodes enable faster setup but work well for P300.

9.-Today's demo uses g.USBamp, g.Nautilus, g.SCARABEO, g.SAHARA, gel, syringes, and g.Recorder software. Compares passive, active, wet and dry.

10.-Passive demo: Abrade skin, apply gel, check impedance. Takes time per electrode. Signal not ideal initially. Fight to get good impedance.

11.-Active electrodes demo with g.HIamp and 64 channels. Rub in gel, no skin abrasion. Names channels. 5-7 min setup. Good signal.

12.-Wireless dry electrode demo with g.Nautilus and g.SAHARA. Place electrodes, start recording in seconds. Adjust pins if needed. Good EEG without prep.

13.-Pricing varies by system components, ranges 5-70K. See Unicorn for education with 8 amps and software licenses.

14.-Unicorn works for neurofeedback. APIs allow real-time EEG access for custom programs.

15.-For poor dry signals, check grounding, ambient noise, clothing. Can apply some gel with g.SAHARA hybrid if needed.

Knowledge Vault built byDavid Vivancos 2024