Simultaneous tES and neuroimaging via HD EEG

GTEN 200*: Geodesic Transcranial Electrical Neuromodulation, 2nd Generation

Leverage the same platform for HD EEG and tES, enabling concurrent recording and stimulating from a single amplifer. Optimize paradigms with flexible combinations of sink and source, and model current flow in source space.

Achieve higher current density

MRI Scans
Get up to 4 times higher current density with GTEN, as the small surface area of the electrodes translate to higher current concentration. For this reason, smaller electrodes have been shown to achieve more focal stimulation at the target site.

Flexible options to customize

Brain data model
Design your stimulation paradigm by: (1) manually selecting electrodes and current level, (2) automatically optimizing based upon an ROI within the brain, or (3) using EEG-based source localization. Use atlas-based head models, or MRI-based individualized models.

Real-time closed loop neuromodulation

GTEN Infographic
Access the EEG data in real-time using the GTEN Software Developer’s Kit (SDK), allowing for closed loop neuromodulation paradigms. Leverage integration with open source software.

Individualize for better outcomes

MRI Scan comparison
Research has shown that individualizing stimulation paradigms increases current at the target location significantly. In one study involving stroke patients, individualization resulted in 64% more current flow at the target on average.1

The Geodesic Transcranial Electrical Neuromodulation (GTEN)* system is a unique and powerful research platform combining noninvasive neuromodulation with HD EEG.

Watch a recent GTEN workshop video to learn more.
GTEN 20Overview - Trey Avery PhD - San Diego - July 29 2019

Robust stimulation planning tools to optimize paradigms

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

The only high density tES system with the ability to simultaneously record high density EEG

Options for 32, 64, 128, or 256 channel sensor nets
allowing any electrodes 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, LORETA, LAURA).
Software Developer’s Kit (SDK) included complimentary.
GTEN 200 Neuromodulation Research System
GTEN 200 Neuromodulation Research System
GTEN 200 Neuromodulation Research System

*The GTEN 200*: Geodesic Transcranial Electrical Neuromodulation is not intended for use in diagnosis or treatment of any disease or condition. It is scientific research instruments designed for performing measurements and acquiring data for neurophysiological research. Philips makes no representation of the suitability of the instrument for any particular research study.

1. Fernández-Corazza M, Turovets S, Luu P, Anderson E and Tucker D (2016) Transcranial Electrical Neuromodulation Based on the Reciprocity Principle. Front. Psychiatry 7:87. doi: 10.3389/fpsyt.2016.00087