3,255 Hits in 11.5 sec

Functional near Infrared Optical Imaging in Cognitive Neuroscience: An Introductory Review

Simone Cutini, Sara Basso Moro, Silvia Bisconti
2012 Journal of Near Infrared Spectroscopy  
Functional near infrared (fNIR) spectroscopy is a non-invasive brain imaging technique that measures the variation of oxygenated and deoxygenated haemoglobin at high temporal resolution.  ...  The increasing body of studies and the constant technical improvement suggest that fNIR spectroscopy is a versatile and promising instrument to investigate the neural correlates of human cognition.  ...  A recent study 103 investigated the spatio-temporal correlation of haemoglobin concentration signals over the whole head during resting state.  ... 
doi:10.1255/jnirs.969 fatcat:6327fglgpjdd3dksi3q3xyar4m

Resting-State Functional Connectivity Estimated With Hierarchical Bayesian Diffuse Optical Tomography

Takatsugu Aihara, Takeaki Shimokawa, Takeshi Ogawa, Yuto Okada, Akihiro Ishikawa, Yoshihiro Inoue, Okito Yamashita
2020 Frontiers in Neuroscience  
Diffuse optical tomography (DOT), a method of neuroimaging using functional near-infrared spectroscopy (fNIRS) to reconstruct three-dimensional brain activity images, offers a non-invasive alternative,  ...  Resting-state functional connectivity (RSFC) has been generally assessed with functional magnetic resonance imaging (fMRI) thanks to its high spatial resolution.  ...  AUTHOR CONTRIBUTIONS TA, TS, TO, YO, AI, YI, and OY designed the study. TA, TS, TO, YO, and OY collected the data. TA analyzed the data. TA, TS, and OY wrote and reviewed the manuscript.  ... 
doi:10.3389/fnins.2020.00032 pmid:32082110 pmcid:PMC7005139 fatcat:2kkiujnjqzfjbctohohou7p77y

Modeling & Analysis

2003 NeuroImage  
Abstract Constrained Principal Component Analysis (CPCA) is introduced as a correlation-based method of identifying (a) connectivity between neuronal structures and (b) functional interactions between  ...  A key feature of the present study is the ability to detect statistically significant departures from white noise in the fMRI spectrum (using the Lomb periodogram), and to apply coherence analysis to frequencies  ...  The number of activated pixels in the whole brain and in predefined ROI (M1 and SMA), as well as the associated percentage of signal change, increased as a function of force.  ... 
doi:10.1016/s1053-8119(05)70006-9 fatcat:zff2suxcofbxvetfrwfwcxi3zm

Cerebral functional imaging using near-infrared spectroscopy during repeated performances of motor rehabilitation tasks tested on healthy subjects

Koji Ishikuro, Susumu Urakawa, Kouich Takamoto, Akihiro Ishikawa, Taketoshi Ono, Hisao Nishijo
2014 Frontiers in Human Neuroscience  
FIGURE 1 | Experimental set-up (A) and protocol (B) of the present study.  ...  Each reaching and peg task consisted of 8 blocks, and each block had 3 phases: (1) rest for 30 s, (2) task for 20 s, and (3) rest for 30 s.  ...  ACKNOWLEDGMENTS This research was supported in part by the JSPS Asian Core Program, the Ministry of Education, Science, Sports and Culture, Grants-in-Aid for Scientific Research (B) (25290005) and for  ... 
doi:10.3389/fnhum.2014.00292 pmid:24860474 pmcid:PMC4026732 fatcat:xfdizmg64rfyzc2ekfuseb5ffy

Correlating functional near-infrared spectroscopy with underlying cortical regions of 0-, 1-, and 2-year-olds using theoretical light propagation analysis

Lin Cai, Eiji Okada, Yasuyo Minagawa, Hiroshi Kawaguchi
2021 Neurophotonics  
functional brain development in the first 2 years of life using functional near-infrared spectroscopy (fNIRS).  ...  Significance: The establishment of a light propagation analysis-based scalp-cortex correlation (SCC) between the scalp location of the source-detector (SD) pair and brain regions is essential for measuring  ...  Acknowledgments We wish to thank our anonymous reviewers for their assistance in clarifying and enhancing this work.  ... 
doi:10.1117/1.nph.8.2.025009 pmid:34079846 pmcid:PMC8166262 fatcat:z3s3wl4tonhbrikmwxwjedvj7e

Statistical analysis of fNIRS data: A comprehensive review

Sungho Tak, Jong Chul Ye
2014 NeuroImage  
a r t i c l e i n f o Functional near-infrared spectroscopy (fNIRS) is a non-invasive method to measure brain activities using the changes of optical absorption in the brain through the intact skull. fNIRS  ...  In addition, to provide a unified view of various existing inference techniques, we explain a linear mixed effect model with restricted maximum likelihood (ReML) variance estimation, and show that most  ...  Introduction Functional near-infrared spectroscopy (fNIRS) is a non-invasive method to measure brain activity by measuring the absorption of the near-infrared light between 650 and 950 nm through the intact  ... 
doi:10.1016/j.neuroimage.2013.06.016 pmid:23774396 fatcat:pc3vhagvy5b3lidlq53ayu7h4i

Optical imaging of the prefrontal activity in joint attention experience

Lina Qiu, Xiao Zhang, Jun Li
2015 Biomedical Optics Express  
Functional near-infrared spectroscopy (fNIRS) was used to measure the prefrontal activity in joint attention experience. 16 healthy adults participated in the experiment in which 42 optical channels were  ...  Cortical hemodynamic response and functional connectivity were measured and averaged across all subjects for each stimulus condition.  ...  Peng, and C. Z. Zhu, "Detecting resting-state functional connectivity in the language system using functional near-infrared spectroscopy," J. Biomed. Opt. 15(4), 047003 (2010). 29. J. Li and L.  ... 
doi:10.1364/boe.6.003437 pmid:26417513 pmcid:PMC4574669 fatcat:nl5ob6zeefgqlcqdoqchngoqym

Cognitive State Analysis, Understanding, and Decoding from the Perspective of Brain Connectivity [article]

Junhua Li, Anastasios Bezerianos, Nitish Thakor
2020 arXiv   pre-print
Cognitive states are involving in our daily life, which motivates us to explore them and understand them by a vast variety of perspectives.  ...  We concentrate on the literature ascertaining macro-scale representations of cognitive states from the perspective of brain connectivity and give an overview of achievements related to cognitive states  ...  Using data modality of functional near-infrared spectroscopy (fNIRS), significantly lower wavelet coherence/wavelet phase coherence was observed in the prefrontal cortex in the frequency bands of 0.6∼2  ... 
arXiv:2005.12191v2 fatcat:wn4hv3v7hncvrejwnotdcb7gw4

Shining a Light on Awareness: A Review of Functional Near-Infrared Spectroscopy for Prolonged Disorders of Consciousness

Mohammed Rupawala, Hamid Dehghani, Samuel J. E. Lucas, Peter Tino, Damian Cruse
2018 Frontiers in Neurology  
Here, we describe a burgeoning technique of non-invasive optical neuroimaging-functional near-infrared spectroscopy (fNIRS)-and review its potential to address the clinical challenges of prolonged disorders  ...  Optical neuroimaging using fNIRS typically requires the use of a set of light-emitting diodes (light sources) on the scalp, and an equal or larger set of detectors,  ...  TABLe 1 | 1 Advantages and disadvantages of the three commonly used functional near-infrared spectroscopy techniques.  ... 
doi:10.3389/fneur.2018.00350 pmid:29872420 pmcid:PMC5972220 fatcat:wtk2uwearzcrbawbnzt66pqcui

Dynamics of the human brain network revealed by time-frequency effective connectivity in fNIRS

Grégoire Vergotte, Kjerstin Torre, Venkata Chaitanya Chirumamilla, Abdul Rauf Anwar, Sergiu Groppa, Stéphane Perrey, Muthuraman Muthuraman
2017 Biomedical Optics Express  
Functional near infrared spectroscopy (fNIRS) is a promising neuroimaging method for investigating networks of cortical regions over time.  ...  We propose a directed effective connectivity method (TPDC) allowing the capture of both time and frequency evolution of the brain's networks using fNIRS data acquired from healthy subjects performing a  ...  Acknowledgments We thank Katy Karpfinger and Ernest Cheryl for their careful proofreading of the manuscript. Disclosures The authors declare no conflicts of interest, financial or otherwise.  ... 
doi:10.1364/boe.8.005326 pmid:29188123 pmcid:PMC5695973 fatcat:vnzuvy2otjf3tfxs4x6kk33jhe

A brief review on the history of human functional near-infrared spectroscopy (fNIRS) development and fields of application

Marco Ferrari, Valentina Quaresima
2012 NeuroImage  
Please cite this article as: Ferrari, M., Quaresima, V., A brief review on the history of human functional near-infrared spectroscopy (fNIRS) development and fields of application, NeuroImage (2012),  ...  gained a new dimension. fNIRS or optical topography, or near-infrared imaging or diffuse optical imaging is used mainly to detect simultaneous changes in optical properties of the human cortex from multiple  ...  Acknowledgments Part of the content of this article has been included in the Keynote Talk "NIRS: a historical perspective" presented at the Functional Near-Infrared Spectroscopy: 2010 Conference (Harvard  ... 
doi:10.1016/j.neuroimage.2012.03.049 pmid:22510258 fatcat:xt7vqrkpprdx3etf36dfv74gdy

Optical aspects of a miniature fluorescence microscope for super-sensitive biomedical detection

Yunfeng Nie, Aikio Sanna, Annukka Kokkonen, Teemu Sipola, Uusitalo Sanna, Simonetta Grilli, Heidi Ottevaere
2020 Zenodo  
We present optical design and the principle demonstrator of a miniature fluorescence microscope aiming for super-sensitive detection.  ...  Current commercial fluorescence microscopes are typically sophisticated, bulky and expensive, not suitable for low-volume or clinic routine biomedical detection.  ...  We report on functional near-infrared spectroscopy (fNIRS) as a tool to monitor the effect of transcranial electrical stimulation (tES) on human bimanual motor performance. 3 Pediatrics, Emory Univ.  ... 
doi:10.5281/zenodo.3822435 fatcat:3eoome22a5grbmarbrktphfh7a

A Review of Optical Nondestructive Visual and Near-Infrared Methods for Food Quality and Safety

Jarmo T. Alander, Vladimir Bochko, Birgitta Martinkauppi, Sirinnapa Saranwong, Timo Mantere
2013 International Journal of Spectroscopy  
This paper is a review of optical methods for online nondestructive food quality monitoring. The key spectral areas are the visual and near-infrared wavelengths.  ...  Hopefully using optical VIS/NIR spectroscopy gives an idea of how to better meet market and consumer needs for high-quality food stuff.  ...  Oy, and Specim, Spectral Imaging Ltd., for funding this research in a project called TarhaNIRSo (FruitForce) in Sapuska Research Program of Tekes.  ... 
doi:10.1155/2013/341402 fatcat:mf3j32r2wnhspiqr5j5xeozlxi

Word Frequency Is Associated With Cognitive Effort During Verbal Working Memory: A Functional Near Infrared Spectroscopy (fNIRS) Study

Amy Berglund-Barraza, Fenghua Tian, Chandramalika Basak, Julia L. Evans
2019 Frontiers in Human Neuroscience  
Hemodynamic changes in the prefrontal cortex were recorded with a continuous-wave functional near-infrared spectroscopy (fNIRS) device.  ...  This novel study examines potential differences in cognitive effort, as measured by differences in HbO2 and Hb, for high frequency versus low frequency words during a working memory paradigm.  ...  ACKNOWLEDGMENTS The authors gratefully thank the volunteer research subjects who participated in this study.  ... 
doi:10.3389/fnhum.2019.00433 pmid:31920592 pmcid:PMC6923201 fatcat:q6zq3pcra5dwxikitmrlcbqxeu

Reconstructing functional near-infrared spectroscopy (fNIRS) signals impaired by extra-cranial confounds: An easy-to-use filter method

F.B. Haeussinger, T. Dresler, S. Heinzel, M. Schecklmann, A.J. Fallgatter, A.-C. Ehlis
2014 NeuroImage  
Functional near-infrared spectroscopy (fNIRS) is an optical neuroimaging method that detects temporal concentration changes of oxygenated and deoxygenated hemoglobin within the cortex, so that neural activation  ...  Future fNIRS studies measuring functional brain activation in the forehead region need to consider the use of different filter options to correct for interfering extra-cranial signals.  ...  of the German federal and state governments.  ... 
doi:10.1016/j.neuroimage.2014.02.035 pmid:24657779 fatcat:guvn4q7jdrenla75qztaghngia
« Previous Showing results 1 — 15 out of 3,255 results