G.GAMMAcap fNIRS is an EEG cap edition that allows the additional montage of 8 fNIRS optodes.
After the cap is removed, the EEG gel almost disappears after some time, and gel is removed completely by washing the hair. A typical setup time for a P300 speller experiment (10 electrodes) is about 2 minutes – just put on the cap and inject the gel. This makes preparation and cleaning very fast, which speeds up experiments considerably. The caps, can be configured with electrodes for a certain experiment (such as the P300 speller), and the electrodes remain inside the cap even during cleaning. The caps can be used with a chest belt strap or with chin straps, which are supplied with each cap. The EEG cap can be mounted with active or passive g.LADYbird EEG electrodes, active g.SCARABEO EEG electrodes or active g.SAHARA Hybrid EEG electrodes.Īll types of active and passive electrodes can be changed or replaced if necessary. The design of the g.SAHARA Hybrid EEG electrodes allows users to just plug the electrode and the clip into the cap at any desired location. g.tec hence developed the 2nd generation of the g.GAMMAcap, with a total of 160 positions according to an extended 10/20 system, to allow a very flexible electrode montage. EEG electrodes are typically positioned according to the international 10/20 system.
ELECTRODE EEG SKIN
EEG recordings are performed at frontal, central, parietal and occipital regions of the head, and therefore a mechanical system is required that holds the electrode on the skin with a constant pressure at every possible recording location. The g.SAHARA hybrid electrode can be used with g.HIamp and with the g.SAHARAbox with g.USBamp. This hybrid approach gives you a more stable EEG recording. Additionally, the electrode has a small hole in the middle to insert conductive electrode gel for wet recordings. The conductive polymer and the 8 pins reduce the electrode-skin impedance and give a solid contact to the skin. The pins have sufficient length to reach through the hair to the skin. You can choose! The g.SAHARA Hybrid EEG is made of a special conductive polymer. The newly developed and patented g.SAHARA Hybrid EEG technology can be used with and without gel. The main advantage of gel-based active EEG electrodes is their robust signal quality, but gel-based caps take longer to mount, and you need to wash the cap and the user’s hair after each recording. The active shielding technology and built-in artifact correction algorithms eliminate noise and artefacts for clean, dry EEG signals.G.SAHARA’s active technology offers an amplifier inside the electrodes, where gel is applied between the electrode and the skin. Waveguard touch is fully compatible with your eego amplifier and eego software. Best in class signal quality and comfort.Available in sizes infant through large adult to ensure a precise fit for many different head shapes.Available in 8-, 32- and 64-channel variants.
ELECTRODE EEG SOFTWARE
Electrode wires are intergrated into the double layered cap fabric.Coated Ag/AgCl EEG electrodes provide stable, research-grade dry EEG.The combination of these innovative dry electrodes and the industry-leading waveguard cap makes waveguard touch the best solution for dry EEG. This great innovation paves the way for the future of EEG with many exciting application areas. The unique Ag/AgCl coated soft polymer electrodes provide stable, research-grade EEG signals while maintaining subject comfort. Waveguard touch is a dry electrode EEG cap, incorporating the latest developments in dry electrode technology.
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