Fnirs Montage Setup
Fnirs Montage Setup - Related Videos
12:00
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Cited by 308 •
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Transcranial direct current stimulation (tDCS) is an established technique to modulate cortical excitability1,2. It has been used as an investigative tool in neuroscience due to its effects on cortical plasticity, easy operation, and safe profile. One area that tDCS has been showing encouraging results is pain alleviation 3-5.
07:47
Non-Invasive Electrical Brain Stimulation Montages for Modulation of Human Motor Function
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Cited by 4 •
2016
Non-invasive electrical brain stimulation can modulate cortical function and behavior, both for research and clinical purposes. This protocol describes different brain stimulation approaches for modulation of the human motor system.
09:23
A Low Cost Setup for Behavioral Audiometry in Rodents
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Cited by 17 •
2012
A fast and inexpensive method for the behavioral determination of hearing parameters like hearing thresholds, hearing impairments or phantom perceptions (subjective tinnitus) is described. It uses pre-pulse inhibition of the acoustic startle response and can be easily implemented in a personal computer using a programmable AD/DA-converter and a piezo sensor.
10:36
fMRI Validation of fNIRS Measurements During a Naturalistic Task
0 Views •
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.
10:13
Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
0 Views •
Cited by 12 •
2017
This paper introduces a protocol for the preparation of hemi-larynx specimens facilitating a multi-dimensional view of vocal fold vibration, in order to investigate various biophysical aspects of voice production in humans and non-human mammals.
FAQs
Montage geometry determines which cortical regions and depths contribute most strongly to the recorded signal. Positions of the light-emitting sources and detecting optodes, together with the spacing between them, shape the sampled area. A poorly matched arrangement may miss the region of interest, whereas a planned layout supports focused assessment of motor, language, or cognitive function.
Source-detector spacing affects the brain regions and tissue depths that the measurement samples. Because near-infrared light travels through the scalp and skull before reaching the detectors, changing this spacing changes the sampled measurement volume. Researchers therefore select spacing as part of the montage design when targeting local cortical hemodynamic changes.
The detectors record changes in oxyhemoglobin and deoxyhemoglobin after near-infrared light passes through the head. These blood-oxygenation changes provide an indirect measure of local cortical hemodynamic activity rather than a direct recording of neuronal firing. Interpreting the resulting data depends on placing the montage over the cortical region relevant to the task or condition.
Preparation begins with planning the source and detector arrangement for the intended cortical targets. The optodes are then placed consistently on the scalp, secured to maintain contact, and anatomically registered so their locations can be related to brain regions. These steps help produce usable measurements and improve comparability between participants and clinical studies.
The montage is designed around the cortical region relevant to the research question. For motor, language, or cognitive studies, investigators plan optode locations and spacing to sample the corresponding areas rather than using an arbitrary arrangement. This targeted design helps relate measured hemodynamic changes to the function or task under investigation.
A carefully designed setup supports investigations of stroke, neurodevelopmental disorders, and other conditions that affect brain activity. It can also be used to study motor, language, and cognitive function. Standardized placement, secure optode contact, and accurate anatomical registration strengthen signal quality and make results more reliable across participants and clinical studies.