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A complete High Density EEG system that provides the ultimate in spatial resolution for any research application. The Geodesic EEG System (GES) 400 features on-board processing, state-of-the-art electronics, and remote upgrade capability. The GES 400 is also easily upgradable for multimodal imaging with integrated tES, fMRI, and more.

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The Geodesic Sensor Net

Simply the fastest and easiest EEG sensor application method!

  • fast application of up to 256 sensors

  • no scalp abrasion or glues

  • no sedation or restraints, even on children with behavioral challenges

  • whole-head coverage and high-resolution data

E-prime stimulus presentation

Complete experimental control workstations

include E-Prime software, computer, and all

hardware needed.

Physio16 physiological measurement hardware

Physio16 input box integrates seamlessly with Geodesic EEG Systems for simultaneous measurement of EEG and physiological data.

Integrated Video Cameras

Camera options for video-EEG range from easy and simple to high-end. All deliver superb video quality and are conveniently controlled from within Net Station software.

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Geodesic Transcranial Electrical Neuromodulation 200 (GTEN 200)*


Record HD EEG and deliver current simultaneously using the same Geodesic Sensor Net

A single integrated platform featuring:

  • Options for 32, 64, 128, or 256 channel sensor nets allowing any electrode to serve as anodes, cathodes or recording electrodes

  • Up to 2 mA current intensity for custom HD tDCS, tACS, tPCS, and tRNS protocols

  • Individualized head modeling and a library of age-matched atlases

  • Source localization tools (LORETA, sLORETA, LAURA)

  • Software Developer’s Kit (SDK) included complimentary

GTEN 2OO Neuromodulation Research System

Robust planning tools to optimize for each individual

Create an MR-based individualized head model or select an age-matched atlas

  • Account for intersubject differences from the start

Design your custom stimulation protocols in one of three ways:

  • Manually select electrodes and current level

  • Choose a region of interest within the brain to target

  • Use EEG-based source localization to guide the stimulation paradigm

Localize with confidence

  • High density, whole head electrode coverage and finite difference method head models allow for highly accurate source localization

Apply the reciprocity theorem to align stimulation with physiology

  • A cortical source’s scalp voltage projection is the same as the scalp stimulation required to stimulate/modulate that cortical source 1


Maximize flexibility with a larger array of montages

Localize targeting by selecting, combining custom stimulation arrays

  • Up to 256 channels of EEG, of which 190 channels can be used for stimulation, with spatial selectivity to stimulate multiple anodal/cathodal pairs at a given time (minimum of 10 pairs needed to achieve maximum current)

Achieve greater focality with smaller stimulation sensors

  • 1cm2 enables 0.2mA/cm2 current density in patch electrodes

Measure the targets and effects with HD EEG

  • Use EEG-based source localization to guide the stimulation paradigm and seamlessly record EEG while stimulating

Close the loop and change protocols in real-time driven by physiology

  • Use the Software Developers’ Kit (SDK) and other open-source platforms to develop and perform closed-loop neuromodulation

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