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New Geodesic Sensor Net product released for EEG-TMS and EEG-MEG

18 May 2015 – EGI is pleased to announce the introduction of the MicroCel Geodesic Sensor Net product line designed specifically for EEG-TMS and EEG-MEG multimodal research applications. With electrodes only 4.8 mm high, this design is ideal for use with EEG-TMS and EEG-MEG.

TMS (transcranial magnetic stimulation) is a noninvasive neurostimulation technique being developed for the evaluation and treatment of a wide variety of brain disorders, including depression, migraine, and stroke rehabilitation. Combining TMS with EEG allows evaluation of the TMS effects at the neurological level. In order to maximize the effectiveness of the TMS when using these two modalities simultaneously, low-profile EEG sensors are required in order to allow the TMS coil to be positioned as close to the scalp as possible, The new MicroCel Geodesic Sensor Net is ideal for this application and has been tested extensively in EGI’s research and development labs.

The new MicroCel Geodesic Sensor Nets are also ideal for use of EEG together with MEG (magnetoencephalography). Whereas EEG measures electrical signals on the scalp, MEG measures the related magnetic signals. Due to the differences between how the electrical and magnetic signals pass through brain tissue to the scalp, the two measurements provide complementary data and thus are often used together for diagnostic confirmation. A limitation to using this technique are the MEG dewar (head cap) sizes — applying large EEG sensors on the scalp can make it difficult for research participants or patients with larger head sizes to fit comfortably inside the MEG dewar. In addition, many researchers continue to use low-density EEG for these measurements, restricting its usefulness. The MicroCel Sensor Nets enable high-density EEG inside the MEG without bulky EED sensors, making high-resolution EEG-MEG possible for a larger cross-section of the population.

The Geodesic Sensor Net family of products represent a significant development in EEG sensor design and application, making it possible to apply up to 256 EEG sensors in just a few minutes, with no scalp abrasion required — see the video. The elimination of scalp abrasion minimizes infection risk, increasing the safety of the EEG procedure, and the quick application makes the advantages of high-density EEG data accessible for any research lab or clinic. Along with ease of use and improved safety, the unique pedestal design is more comfortable than any other EEG electrode on the market, increasing participant and patient comfort and improving the quality of the EEG signal, especially for longer term measurements. In addition to the new MicroCel configuration, Geodesic Sensor Nets are available in configurations for routine monitoring using sponges and a saline solution, long term monitoring using conventional pastes, routine and LTM EEG measurements in the MR environment, and in channel counts from 32 to 256 sensors.

Learn more about EGI’s Geodesic Sensor Nets.

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