Abstract
Fast cerebral functional signals in the 100 ms range detected by frequency-domain near-infrared spectroscopy
Highlights
Using non-invasive near-infrared spectroscopy (NIRS) fast changes in the range of milliseconds in the optical properties of cerebral tissue have been described, which are associated with brain activity [l]
One location showed a significant change in the AC ab well as in the phase
For the periods without stimulation 6 samples in 2 locations with significant changes were detected in the AC as opposed to 20 samples m 4 locations during stimulation
Summary
Using non-invasive near-infrared spectroscopy (NIRS) fast changes in the range of milliseconds in the optical properties of cerebral tissue have been described, which are associated with brain activity [l]. This signal i6 small and related to changes in light scattering due to alteration in the refractive index at neuronal membranes [2]. We obtained functional maps of this fast signal in the visual cortex during visual stimulation with a new type of sensor. We obtained functional maps of this fast signal in the visual cortex during visual stimulation with a new type of sensor. the n-sensor
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