The present and future use of functional near‐infrared spectroscopy (fNIRS) for cognitive neuroscience

Annals of the New York Academy of Sciences, Год журнала: 2018, Номер 1464(1), С. 5 - 29

Опубликована: Авг. 7, 2018

Abstract The past few decades have seen a rapid increase in the use of functional near‐infrared spectroscopy (fNIRS) cognitive neuroscience. This fast growth is due to several advances that fNIRS offers over other neuroimaging modalities such as magnetic resonance imaging and electroencephalography/magnetoencephalography. In particular, harmless, tolerant bodily movements, highly portable, being suitable for all possible participant populations, from newborns elderly experimental settings, both inside outside laboratory. this review we aim provide comprehensive state‐of‐the‐art basics, technical developments, applications. discuss some open challenges potential neuroscience research, with particular focus on naturalistic environments social

Язык: Английский

---

Twenty years of functional near-infrared spectroscopy: introduction for the special issue

NeuroImage, Год журнала: 2013, Номер 85, С. 1 - 5

Опубликована: Дек. 7, 2013

Язык: Английский

---

False positives and false negatives in functional near-infrared spectroscopy: issues, challenges, and the way forward

Neurophotonics, Год журнала: 2016, Номер 3(3), С. 031405 - 031405

Опубликована: Март 9, 2016

We highlight a significant problem that needs to be considered and addressed when performing functional near-infrared spectroscopy (fNIRS) studies, namely the possibility of inadvertently measuring fNIRS hemodynamic responses are not due neurovascular coupling. These can misinterpreted as brain activity, i.e., “false positives” (errors caused by wrongly assigning detected response activity), or mask negatives” observed in presence activity). Here, we summarize possible physiological origins these issues suggest ways avoid remove them.

Язык: Английский

---

Two-Site Occupation for Exploring Ultra-Broadband Near-Infrared Phosphor—Double-Perovskite La₂MgZrO₆:Cr³⁺

Chemistry of Materials, Год журнала: 2019, Номер 31(14), С. 5245 - 5253

Опубликована: Июнь 28, 2019

The near-infrared phosphor-converted light-emitting diodes (NIR pc-LEDs) have great potential in food industry and medical fields. For applications based on NIR spectroscopy, the next generation of pc-LEDs is a high demand spectrum with much broader full width at half-maximum (fwhm), which triggers discovery novel broadband phosphors. In this work, Cr3+-doped La2MgZrO6 (LMZ) was successfully synthesized by conventional solid-state method reducing atmosphere, double-perovskite oxide LMZ two distorted octahedral sites finally led to an ultra-broadband Cr3+ emission centered 825 nm extremely large fwhm 210 internal quantum efficiency ∼58%. experimental data theoretical calculation confirmed that available different crystal field environments contributed emission. parameters, decay time, temperature-dependent photoluminescence properties were investigated discussed further understand luminescence LMZ:Cr. suitability title phosphor multifunctional demonstrated pumping it blue, green, and/or red LED chips.

Язык: Английский

---

Neuroimaging and neuromodulation approaches to study eating behavior and prevent and treat eating disorders and obesity

NeuroImage Clinical, Год журнала: 2015, Номер 8, С. 1 - 31

Опубликована: Янв. 1, 2015

Functional, molecular and genetic neuroimaging has highlighted the existence of brain anomalies neural vulnerability factors related to obesity eating disorders such as binge or anorexia nervosa. In particular, decreased basal metabolism in prefrontal cortex striatum well dopaminergic alterations have been described obese subjects, parallel with increased activation reward areas response palatable food cues. Elevated region responsivity may trigger craving predict future weight gain. This opens way prevention studies using functional perform early diagnostics phenotype subjects at risk by exploring different neurobehavioral dimensions choices motivation processes. first part this review, advantages limitations techniques, magnetic resonance imaging (fMRI), positron emission tomography (PET), single photon computed (SPECT), pharmacogenetic fMRI near-infrared spectroscopy (fNIRS) will be discussed context recent work dealing behavior, a particular focus on obesity. second non-invasive strategies modulate food-related processes functions presented. At leading edge brain-based technologies is real-time (rtfMRI) neurofeedback, which powerful tool better understand complexity human brain–behavior relationships. rtfMRI, alone when combined other techniques tools EEG cognitive therapy, could used alter plasticity learned behavior optimize and/or restore healthy cognition behavior. Other promising neuromodulation approaches being explored are repetitive transcranial stimulation (rTMS) direct-current (tDCS). Converging evidence points value these study basic mechanisms underlying treat its disorders. Both compared light field, while addressing technical practical questions. The third review dedicated invasive strategies, vagus nerve (VNS) deep (DBS). combination approaches, experimental unravel intricate relationships between homeostatic hedonic circuits. Their potential additional therapeutic combat pharmacorefractory morbid acute discussed, terms challenges, applicability ethics. general discussion, we put core fundamental research, therapy First, discuss possibility identify new biological markers functions. Second, highlight individualized medicine. Third, introduce ethical questions that concomitant emergence therapies.

Язык: Английский

---

The NIRS Brain AnalyzIR Toolbox

Algorithms, Год журнала: 2018, Номер 11(5), С. 73 - 73

Опубликована: Май 16, 2018

Functional near-infrared spectroscopy (fNIRS) is a noninvasive neuroimaging technique that uses low-levels of light (650–900 nm) to measure changes in cerebral blood volume and oxygenation. Over the last several decades, this has been utilized growing number functional resting-state brain studies. The lower operation cost, portability, versatility method make it an alternative methods such as magnetic resonance imaging for studies pediatric special populations without confining limitations supine motionless acquisition setup. However, analysis fNIRS data poses challenges stemming from unique physics technique, statistical properties data, diversity non-traditional experimental designs being due flexibility technology. For these reasons, specific technology must be developed. In paper, we introduce NIRS Brain AnalyzIR toolbox open-source Matlab-based package management, pre-processing, first- second-level (i.e., single subject group-level) analysis. Here, describe basic architectural format toolbox, which based on object-oriented programming paradigm. We also detail algorithms major components including analysis, probe registration, image reconstruction, region-of-interest statistics.

Язык: Английский

---

General equation for the differential pathlength factor of the frontal human head depending on wavelength and age

Journal of Biomedical Optics, Год журнала: 2013, Номер 18(10), С. 105004 - 105004

Опубликована: Окт. 11, 2013

Continuous-wave near-infrared spectroscopy and imaging enable the measurement of relative concentration changes in oxy- deoxyhemoglobin thus hemodynamics oxygenation. The accuracy determined depends mainly on modeling light transport through probed tissue. Due to highly scattering nature tissue, path is longer than source-detector separation (d). This incorporated by multiplying d a differential pathlength factor (DPF) which several factors such as wavelength, age subject, type In present work, we derive general DPF equation for frontal human head, incorporating dependency wavelength age, based published data. We validated using different data sets experimentally DPFs from six independent studies.

Язык: Английский

---

Best practices for fNIRS publications

Neurophotonics, Год журнала: 2021, Номер 8(01)

Опубликована: Янв. 7, 2021

The application of functional near-infrared spectroscopy (fNIRS) in the neurosciences has been expanding over last 40 years. Today, it is addressing a wide range applications within different populations and utilizes great variety experimental paradigms. With rapid growth diversification research methods, some inconsistencies are appearing way which methods presented, can make interpretation replication studies unnecessarily challenging. Society for Functional Near-Infrared Spectroscopy thus motivated to organize representative (but not exhaustive) group leaders field build consensus on best practices describing utilized fNIRS studies. Our paper designed provide guidelines help enhance reliability, repeatability, traceability reported encourage throughout community. A checklist provided guide authors preparation their manuscripts assist reviewers when evaluating papers.

Язык: Английский

---

Applications of Functional Near-Infrared Spectroscopy (fNIRS) Neuroimaging in Exercise–Cognition Science: A Systematic, Methodology-Focused Review

Journal of Clinical Medicine, Год журнала: 2018, Номер 7(12), С. 466 - 466

Опубликована: Ноя. 22, 2018

For cognitive processes to function well, it is essential that the brain optimally supplied with oxygen and blood. In recent years, evidence has emerged suggesting cerebral oxygenation hemodynamics can be modified physical activity. To better understand relationship between oxygenation/hemodynamics, activity, cognition, application of state-of-the art neuroimaging tools essential. Functional near-infrared spectroscopy (fNIRS) such a tool especially suitable investigate effects activity/exercises on due its capability quantify changes in concentration oxygenated hemoglobin (oxyHb) deoxygenated (deoxyHb) non-invasively human brain. However, currently there no clear standardized procedure regarding application, data processing, analysis fNIRS, large heterogeneity how fNIRS applied field exercise–cognition science. Therefore, this review aims summarize current methodological knowledge about studies measuring cortical hemodynamic responses during testing (i) prior after different activities interventions, (ii) cross-sectional accounting for fitness level their participants. Based methodology 35 as relevant considered publications, we outline recommendations future

Язык: Английский

---

Current Status and Issues Regarding Pre-processing of fNIRS Neuroimaging Data: An Investigation of Diverse Signal Filtering Methods Within a General Linear Model Framework

Frontiers in Human Neuroscience, Год журнала: 2019, Номер 12

Опубликована: Янв. 10, 2019

Functional near-infrared spectroscopy (fNIRS) research articles show a large heterogeneity in the analysis approaches and pre-processing procedures. Additionally, there is often lack of complete description methods applied, necessary for study replication or results comparison. The aims this paper were (i) to review investigate which information generally included published fNIRS papers, (ii) define signal procedure set common ground standardization guidelines. To goal, we have reviewed 110 2016 field cognitive neuroscience, performed simulation with synthetic data optimize filtering step before applying GLM method statistical inference. Our highlight fact that many papers important information, variability used. simulations demonstrated optimal approach remove noise recover hemodynamic response from framework use 1000th order band-pass Finite Impulse Response filter. Based on these results, give preliminary recommendations as first toward improving dissemination results.

Язык: Английский

---