• functional Near-Infrared Spectroscopy (fNIRS) is a non-invasive neuroimaging method that, similar to fMRI, takes advantage of neurovascular coupling to detect cortical brain activity
  • fNIRS measures concentration changes in oxygenated and deoxygenated haemoglobin via their different spectral absorption characteristics
  • Via the typical hemodynamic response function that goes along with neuronal activity active brain regions can be detected with high spatial resolution
  • In contrast to other methods like fMRI or EEG, fNIRS is not strongly affected by movement artifacts, opening up the unique possibility for measurements of neural activity in applied settings

Lab equipment:

  • a portable NIRSportTM NIRS system (NIRx Medizintechnik GmbH) with time-multiplexed double-wavelength LED control
    • the 8 LED sources can be combined individually with the active 8 sensors resulting in a theoretical maximum of 64 channels
    • both sources and sensors are - in accordance to the question - placed in 130 position an EEG cap
  • the recording via a laptop (Intel Core i5, 8GB DDR3 500GB SSD) equipped with NIRStar recording software
  • NIRS Brain AnalyzIR Toolbox (Santosa, Zhai, Fishburn & Huppert, 2018) for Matlab (MathWorks) is used for statistical analyses
  • the system is compatible with the hardware and software of the EEG-lab