Fiberless Fnirs
Fiberless Fnirs - Related Videos
10:07
Using Fiberless, Wearable fNIRS to Monitor Brain Activity in Real-world Cognitive Tasks
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Cited by 162 •
2015
Monitoring brain activity outside the lab without physical constraints presents methodological challenges. A fiberless, wearable functional Near Infrared Spectroscopy (fNIRS) system was used to measure brain activity during an ecological prospective memory task. It was demonstrated that this system could be used to monitor brain activity during non-lab based experiments.
10:36
fMRI Validation of fNIRS Measurements During a Naturalistic Task
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Cited by 107 •
2015
We present a method to compare functional brain activity recorded during a naturalistic task using fNIRS with activity recorded during fMRI.
05:33
How to Calculate and Validate Inter-brain Synchronization in a fNIRS Hyperscanning Study
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Cited by 20 •
2021
The dynamics between coupled brains of individuals have been increasingly represented by inter-brain synchronization (IBS) when they coordinate with each other, mostly using simultaneous-recording signals of brains (namely hyperscanning) with fNIRS. In fNIRS hyperscanning studies, IBS has been commonly assessed through the wavelet transform coherence (WTC) method because of its advantage on expanding time series into time-frequency space where oscillations can be seen in a highly intuitive way.
04:44
Inter-Brain Synchrony in Open-Ended Collaborative Learning: An fNIRS-Hyperscanning Study
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Cited by 6 •
2021
The protocol for conducting fNIRS hyperscanning experiments on collaborative learning dyads in a naturalistic learning environment is outlined. Further, a pipeline to analyze the Inter-Brain Synchrony (IBS) of oxygenated hemoglobin (Oxy-Hb) signals is presented.
04:43
Investigating the Effect of Different Types of Exercise on Upper Limb Functional Recovery in Patients with Right Hemisphere Damage Based on fNIRS
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Cited by 1 •
2024
Here, we investigate the effect of functional occupational therapy combined with assisted active or passive motion on the upper limb function of patients with right hemisphere damage and explore the effect of functional near-infrared spectroscopy on brain function remodeling.
FAQs
The system sends near-infrared light into the scalp at multiple wavelengths and measures the returning light collected by scalp-mounted detectors. Because oxygenated and deoxygenated hemoglobin absorb these wavelengths differently, changes in detected light provide estimates of task-related changes in each form of hemoglobin. This wavelength-dependent absorption is the basis for relating optical measurements to cerebral oxygenation.
Light sources deliver near-infrared signals through the scalp, while detectors collect the light after it has traveled through the measured tissue. The recording system compares how absorption changes across wavelengths during a task, allowing it to estimate changes in oxygenated and deoxygenated hemoglobin. Mounting both components on the scalp supports measurements without relying on bulky fiber bundles.
The main distinction is how optical signals reach and leave the participant. Fiberless systems use scalp-mounted sources and detectors, whereas fiber-based arrangements rely on bulky fiber bundles that can tether participants. Reducing this tethering can provide greater mobility, making it more practical to examine movement, interaction, and other behaviors that are difficult to study under highly constrained laboratory conditions.
A behavioral task is performed while scalp-mounted sources emit near-infrared light and detectors collect the resulting signals. The recorded changes in light absorption are examined across wavelengths to estimate oxygenated and deoxygenated hemoglobin changes associated with the task. Researchers can then relate those cerebral oxygenation patterns to the participant’s attention, decision-making, movement, interaction, or other observed behavior.
Researchers would choose this approach when the study requires participants to move more freely or engage in interaction rather than remain tightly constrained. Its reduced cable burden supports naturalistic tasks and ecologically relevant settings, where behavior may include movement or social interaction. The resulting recordings can help investigate how cerebral oxygenation relates to attention, decisions, and social behavior.
Fiberless fNIRS recordings can be used to examine relationships between task-related cerebral oxygenation and several behavioral domains. Supported examples include attention, decision-making, movement, interaction, and social behavior. This makes the approach useful for extending neuroimaging beyond restricted laboratory tasks and for studying neural oxygenation during behaviors that more closely resemble natural activity.