g.Nautilus fNIRS is a wearable EEG and fNIRS (functional near-infrared spectroscopy) acquisition headset. fNIRS can assess the oxygenation status and hemodynamics of the brain non-invasively. The oxygenation depends on how the brain reflects light, which changes as brain areas become more active. Researchers can thus identify brain activity in real-time based on changes in blood oxygenation and other factors.
The fNIRS measures oxy-, deoxy- and total hemoglobin. The EEG instead measures the electrical activity of the brain and provides high temporal resolution, unlike fNIRS. g.Nautilus fNIRS allows you to use the fast EEG signal and the slow fNIRS signals in one single device. This can be used to decode information like motor imagery from the EEG and long lasting changes like mental counting or pain with the fNIRS. The big advantage is that you can capture signals that might be missed by only using EEG or fNIRS.
The wearable headset sets a new standard of usability. In combination with g.tec’s active EEG electrode technology, users get top-quality EEG recordings from 64/32/16/8 EEG channels and 8 fNIRS channels within a few minutes.
|Combined fNIRS and EEG measurements with a single wearable headset|
|g.SCARABEO gel based EEG electrodes|
|LED based fNIRS sensors for the forehead and for central positions|
|Flexible solution: position the EEG electrodes as you wish|
|64/32/16/8 channel wearable EEG with 3-axis accelerometer|
|24 bit accuracy at 500 Hz sampling rate for EEG|
|10 Hz sampling rate for (8 channels) fNIRS|
|A new benchmark in usability|
|The only wearable EEG+fNIRS headset with active EEG technology|
|g.tec's unique internal impedance check|
|10 hours continuous EEG recording and 2-3 hours charging (32 channel version); 1.5 hours (high power LED) – 8 hours (low power LED) of fNIRS recording|
|Wireless digital transmission, range: 10 meters indoor|
|Full integration into g.tec's software environment|
|Used for research applications only|
|Weight||500 g without fNIRS battery box|
|Size||78 (L) x 122 (W) x 50 (H) mm|
|Sensitivity||±2.25 V, ±1.125 V, ±750 mV, ±562,5 mV, ±375 mV, ±187.5 mV (software selectable)|
|Interface||Wireless 2.4 GHz ISM band|
|Digital inputs||8 digital trigger inputs at Base Station|
|EEG Supply||Built-in lithium ion battery, runtime > 10 h, inductive charging according to the QI standard of the Wireless Power Consortium|
|fNIRS Supply||Exchangeable lithium ion battery|
|Amplifier type||Real DC coupled|
|32 × ADC||24 Bit (1.024 MHz internal sampling per channel)|
|Noise level||< 0.6 µV RMS between 1 and 30 Hz (at highest input sensitivity)|
|Input channels||Up to 32 mono-polar / 16 bi-polar channels with GND and REF (software selectable)|
|Input impedance||DC > 100 MOhm|
MEASURING EMOTIONAL RESPONSE
Dolby Laboratories is widely known for producing great sound in cinemas, and has been around since 1965. Inside San Francisco, more than hundred labs are working on enhancements of the technology. One of these projects is using g.Nautilus to study people while they are watching videos. These scientists try to better understand what makes you engaged, what makes your skin blush, increases your heart-rate or gives you goose bumps.
USE FAST AND SLOW BRAIN RESPONSES
g.Nautilus fNIRS allows you to use the fast EEG signal and the slow fNIRS signal in one single headset. This can be used to decode information like motor imagery from the EEG and long lasting changes like mental counting or pain with the fNIRS. The big advantage is that you can capture signals that might be missed by only using EEG or fNIRS.
Wearable EEG and biosignal acquisition headsets are becoming increasingly important in medical and clinical environments, especially since more and more studies are conducted in the field instead of the lab. Therefore, g.tec developed g.Nautilus. Its design is completely different from all other devices, and it sets a new standard of usability. The tiny and lightweight device is attached to the EEG cap to avoid cable movements and to allow completely free movements. In combination with dry or gel-based active EEG electrode technology, users get top quality EEG recordings from 8-64 channels within few minutes.
“We will witness more and more mixed fNIRS and EEG BCIs entering into the human augmentation arena, as more and more machine learning and AI will be coming into our lives.”Tomasz Rutowski, PhD - Research Scientist at RIKEN AIP, Japan