Innovative wireless EEG and fNIRS device for 64 channels

NAUTILUS fNIRS

HIGHLY INTEGRATED WIRELESS EEG AND FNIRS

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Must have device for wireless EEG and fNIRS acquisition

g.Nautilus fNIRS allows the wireless EEG and fNIRS data acquisition and real-time processing. Researchers can quickly capture high-quality EEG data from 8, 16, 32, or 64 g.SCARABEO EEG channels, alongside 8 fNIRS channels, in just a few minutes.

The g.Nautilus RESEARCH and g.Nautilus MULTI-PURPOSE systems, in combination with the fNIRS, enable simultaneous recording of EEG and fNIRS signals for comprehensive brain monitoring.

The g.Nautilus PRO FLEXIBLE model allows customization with plug-in electrode strands, supporting both g.SAHARA hybrid dry EEG electrodes and g.SCARABEO wet EEG electrodes, alongside 8 fNIRS channels. Users can choose from electrode strands featuring 8, 16, 19, or 32 EEG channels, with optional safety connectors for integrating additional body sensors:

  • Strand g.SCARABEO
  • Strand g.SAHARA Hybrid
  • Strand g.SCARABEO + 4  Safety Connectors
  • Strand g.SAHARA Hybrid + 4  Safety Connectors
  • Strand Safety Connectors Only

Wireless EEG and fNIRS with only one cap

g.SENSOR fNIRS with 8 optodes can be easily inserted into the g.GAMMAcap fNIRS, which features optode holders positioned over both the frontal and sensorimotor cortices. The cap uses low-power optodes for the frontal cortex and high-power optodes for the sensorimotor cortex. This setup allows for seamless integration of g.SENSOR fNIRS with g.SCARABEO or g.SAHARA electrodes, providing a fully customizable solution for EEG and fNIRS recordings. The system also supports magnetic attachment of g.SENSOR fNIRS to g.Nautilus for easy, pre-defined placement over key brain regions.

To read more about neuroscience experiments with g.tec technology, please visit our Frontiers profile.

Why is a combination of EEG and fNIRs suggested?

A combined recording of EEG and fNIRS is suggested because these two neuroimaging techniques provide complementary data about brain activity, leading to a more comprehensive understanding of neural processes. Here’s why it’s beneficial:

  1. Temporal vs. Spatial Resolution:
    • EEG offers high temporal resolution, capturing brain activity changes in the millisecond range, making it ideal for studying rapid neural dynamics.
    • fNIRS, on the other hand, provides better spatial resolution, measuring changes in blood oxygenation and hemodynamics, which reflect brain activity but with slower dynamics.

    Combining them gives a balance of both high temporal and good spatial resolution.

  2. Direct and Indirect Measures:
    • EEG directly measures electrical activity from neurons.
    • fNIRS indirectly measures brain activity by tracking oxygenated and deoxygenated hemoglobin levels, reflecting neuronal metabolism.

    Using both provides insights into both electrical and metabolic activity, offering a fuller picture of brain function.

  3. Complementary Data:
    • EEG can pinpoint fast changes in brain activity, like responses to stimuli, while fNIRS tracks slower processes related to blood flow changes. Together, they capture different aspects of the same brain processes.
  4. Non-invasive and Portable: Both EEG and fNIRS are non-invasive, and advancements in portable systems make it possible to perform combined recordings in naturalistic or real-world environments.
  5. Applications in Neurofeedback and BCI: In Brain-Computer Interfaces (BCI) and neurofeedback, combining EEG and fNIRS can provide richer data to enhance control signals or improve training efficiency.

By using both techniques together, researchers and clinicians can gather more detailed, multi-dimensional data about the brain’s electrical activity and its metabolic changes. This is particularly useful in cognitive neuroscience, clinical studies, and real-world brain monitoring.

PRODUCT HIGHLIGHTS

10 Hz sampling rate for (8 channels) fNIRS
8 fNIRS transmitters and 2 receivers
High-power optodes for recordings on the sensorimotor cortex
Low-power optodes for recordings on the frontal cortex
1.5 hours (high-power LED) - 8 hours (low-power LED) fNIRS recordings
Wireless digital transmission, range: 10 meters indoor
Fully integrated in g.HIsys software environment
Fully integrated wireless EEG and fNIRS system
Available with g.Nautilus Research, g.Nautilus Multi-Purpose and g.Nautilus PRO flexible
8/16/32 or 64 EEG channels

TECHNICAL SPECIFICATIONS

fNIRS SupplyExchangeable lithium ion battery
fNIRS sampling frequency10 Hz
Number of transmitters8
Number of receivers2
EEG sampling frequency250/500 Hz for 8/16/32 channels, 250 Hz for 64 channels

COMBINED EEG AND FNIRS RECORDINGS

g.tec offers the perfect solution for seamless EEG and fNIRS recordings, providing everything you need to set up your neuroscience experiment with ease. Choose from a variety of EEG and biosignal amplifiers, including wearable options, as well as active wet or hybrid dry EEG electrodes and different EEG cap sizes to fit your needs. Whether you opt for g.HIamp, g.USBamp, or one of our g.Nautilus headsets (PRO Flexible, Multi-Purpose, PRO, or RESEARCH), you’ll get high-quality EEG and fNIRS signals in one integrated setup. The EEG electrodes and fNIRS optodes are combined in a single cap for precise positioning and optimal scalp contact, ensuring reliable and accurate measurements.

ASSEMBLING OPTIONS OF EEG AND FNIRS

The optodes can be placed into the optode holder pads located either on the left/right sensorimotor cortex or left/righ frontal cortex of the g.GAMMAcap. The EEG electrodes (available in configurations of 8, 16, 32, or 64 channels) are inserted into the dark blue electrode holder rings.

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Choose biosignal amplifier

Select fNIRS / NIRx in Assembling

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YOUR COMBINED EEG & FNIRS RECORDING

Combined EEG & fNIRS/NIRx

g.hiamp biosignal amplifier gtec medical engineering 8 g.HIAMP
g.hiamp biosignal amplifier gtec medical engineering 8 g.HIAMP
g.USBamp 16 Channel EEG amplifier g.USBAMP
g.Nautilus Research wearable EEG headset g.NAUTILUS Multi-Purpose
g.Nautilus Flexible g.NAUTILUS PRO Flexible
g.Nautilus Research wearable EEG headset g.NAUTILUS RESEARCH
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