The mobile brain imaging lab comprises mobile imaging systems like Electroencephalography (EEG) and functional Near-Infrared Spectroscopy (fNIRS), along with mobile eye-tracking technology. Moreover, the lab includes stationary systems optimized for spatial and temporal resolution. These systems provide real-time data on brain activity and human behavior, aiding both basic neuroscience and applied science studies. They are utilized alongside robotic systems and a driving simulator in the lab. The primary focus is on developing digital brain markers, Neurofeedback, Brain-Computer Interface (BCI) systems, and neuromonitoring.
These technologies are vital for real-world applications like motor rehabilitation following stroke and addressing neurological disorders. Digital biomarkers can be used to assess patient’s recovery process. BCI systems in the lab help in externalizing control of movement using brain signals, which is key in motor rehabilitation. Neurofeedback involves training that links motor-related brain signals to assistive devices, improving motor function.
Key Technologies
EEG (Electroencephalography) measures electrical activity in the brain by detecting potential differences on the scalp from the synchronized firing of neuron populations. This non-invasive method provides real-time insights into brain electrophysiology and cognitive processes. In our laboratory, we use a 256-channel BioSemi ActiveTwo system, a stationary setup optimized for high channel count, digital resolution, and sample rate.
For mobile EEG applications, we utilize a 64-channel EEGo sports system by ANT Neuro, which offers up to 5 hours of recording time. Its lightweight design, with a combined amplifier and battery weighing 500 grams, ensures easy portability for real-world, non-laboratory settings.
fNIRS (functional Near Infrared Spectroscopy) measures brain activity by tracking changes in blood flow using light that penetrates the skull and reflects back to a detector. This cost-effective technique identifies active brain regions during tasks, similar to fMRI, but allows more movement and can even be preferable to EEG in certain situations. We use the optoHive system, developed by an ETHZ spinout, which is a portable, modular, and high-density fNIRS solution capable of capturing measurements from a single area to full-head coverage.
We utilize the Tobii Pro Spectrum system, featuring a 1200 Hz refresh rate, for intensive scientific research, including fixation studies and micro-saccades. This screen-based eye tracker provides precise gaze data for a variety of applications. For mobile eye tracking, we employ the Tobii Pro Glasses 2, which capture natural eye movements in real-world settings. These lightweight glasses are equipped with four eye-tracking cameras operating at 100 Hz and come with a portable recording unit that easily attaches to a pocket, making them ideal for studying interactions with physical objects and environments.
We combine mobile brain imaging and eye tracking with a FOREST driving simulator, which records extensive real-time data such as the car’s position and control status. This simulator allows for precise replication of traffic scenarios and assessment of driving behavior, enhancing our research capabilities. Our mobile data collection tools are also used in combination with many of the systems in our other labs such as the CAREN and robotic devices.
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