Effects of Processing Methods on fNIRS Signals Assessed During Active Walking Tasks in Older Adults DOI
Meltem İzzetoğlu, Roee Holtzer

IEEE Transactions on Neural Systems and Rehabilitation Engineering, Journal Year: 2020, Volume and Issue: 28(3), P. 699 - 709

Published: Feb. 12, 2020

Functional near infrared spectroscopy (fNIRS) is a noninvasive optics-based neuroimaging modality successfully applied to real-life settings. The technology uses light in the range (650-950nm) track changes oxygenated (HbO2) and deoxygenated hemoglobin (Hb) obtained from measured intensity using light-tissue interaction principles. fNIRS data processing involves artifact removal hemodynamic signal conversion modified Beer-Lambert law (MBLL) obtain Hb HbO2, reliably. signals can get contaminated by various noise sources of physiological non-physiological origins. Various algorithms have been proposed for elimination artifacts frequency selective filters blind source separation methods. Hemodynamic extraction raw measurements at multiple wavelengths based on MBLL usually apriori knowledge certain parameters such as molar extinction coefficients (ε) differential path length factor (DPF). Different sets dependent upon wavelength, chromophores, age reported. Variation cause differences HbO2 which turn change study outcomes. Using fNIRS, we previously shown significant increases oxygenation prefrontal cortex Single-Task-Walking (STW) Dual-task-Walking (DTW) conditions older adults due greater cognitive demands inherent latter condition. In current study, re-analyzed our determined that although different i.e. ε DPF filter cut-off frequencies 0.14 0.08Hz including those designed remove confounding effects Mayer waves had caused some linear or decreases extracted signals, were minimal task related comparisons hence, overall

Language: Английский

Applications of Functional Near-Infrared Spectroscopy (fNIRS) Neuroimaging in Exercise–Cognition Science: A Systematic, Methodology-Focused Review DOI Open Access
Fabian Herold, Patrick Wiegel, Felix Scholkmann

et al.

Journal of Clinical Medicine, Journal Year: 2018, Volume and Issue: 7(12), P. 466 - 466

Published: Nov. 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

Language: Английский

Citations

357
Cortical activity during walking and balance tasks in older adults and in people with Parkinson’s disease: A structured review DOI
Samuel Stuart, Rodrigo Vitório, Rosie Morris

et al.

Maturitas, Journal Year: 2018, Volume and Issue: 113, P. 53 - 72

Published: April 25, 2018

Language: Английский

Citations

158
A consensus guide to using functional near-infrared spectroscopy in posture and gait research DOI
Jasmine C. Menant, Inbal Maidan, Lisa Alcock

et al.

Gait & Posture, Journal Year: 2020, Volume and Issue: 82, P. 254 - 265

Published: Sept. 18, 2020

Language: Английский

Citations

107
The neural correlates of discrete gait characteristics in ageing: A structured review DOI Creative Commons

Joanna Wilson,

Liesl M. Allcock,

Ríona Mc Ardle

et al.

Neuroscience & Biobehavioral Reviews, Journal Year: 2018, Volume and Issue: 100, P. 344 - 369

Published: Dec. 13, 2018

Gait is complex, described by diverse characteristics underpinned widespread central nervous system networks including motor and cognitive functions. Despite this, neural substrates of discrete gait are poorly understood, limiting understanding impairment in ageing disease. This structured review aims to map characteristics, defined from a pre-specified model reflecting independent domains, brain imaging parameters older adults. Fifty-two studies 38,029 yielded were reviewed. Studies showed inconsistent approaches when mapping assessment substrates, conclusions. impairments typically associated with deterioration, specifically grey matter atrophy white integrity loss. velocity, global measure control, was most frequently these markers within frontal basal ganglia regions, its decline predicted volume measurements. Fewer assessed additional measures or functional parameters. Future regional neuroanatomical correlates needed, those which take multi-process network perspective better understand mobility health

Language: Английский

Citations

106
fNIRS-based Neurorobotic Interface for gait rehabilitation DOI Creative Commons
Rayyan Azam Khan, Noman Naseer, Nauman Khalid Qureshi

et al.

Journal of NeuroEngineering and Rehabilitation, Journal Year: 2018, Volume and Issue: 15(1)

Published: Feb. 5, 2018

In this paper, a novel functional near-infrared spectroscopy (fNIRS)-based brain-computer interface (BCI) framework for control of prosthetic legs and rehabilitation patients suffering from locomotive disorders is presented. fNIRS signals are used to initiate stop the gait cycle, while nonlinear proportional derivative computed torque controller (PD-CTC) with gravity compensation torques hip knee joints minimization position error. present study, brain walking intention rest tasks were acquired left hemisphere's primary motor cortex nine subjects. Thereafter, removal motion artifacts physiological noises, performances six different filters (i.e. Kalman, Wiener, Gaussian, hemodynamic response filter (hrf), Band-pass, finite impulse response) evaluated. Then, features extracted oxygenated hemoglobin signals, their combinations classification. Also, classification five classifiers k-Nearest Neighbour, quadratic discriminant analysis, linear analysis (LDA), Naïve Bayes, support vector machine (SVM)) tested. The accuracies obtained SVM using hrf significantly higher (p < 0.01) than those other classifier/ combinations. Those 77.5, 72.5, 68.3, 74.2, 73.3, 80.8, 65, 76.7, 86.7% subjects, respectively. commands generated initiated stopped cycle leg, which controlled PD-CTC minimize proposed scheme can be effectively neurofeedback training lower-limb amputees paralyzed patients.

Language: Английский

Citations

101
A Mini-Review on Functional Near-Infrared Spectroscopy (fNIRS): Where Do We Stand, and Where Should We Go? DOI Creative Commons
Valentina Quaresima, Marco Ferrari

Photonics, Journal Year: 2019, Volume and Issue: 6(3), P. 87 - 87

Published: Aug. 1, 2019

This mini-review is aimed at briefly summarizing the present status of functional near-infrared spectroscopy (fNIRS) and predicting where technique should go in next decade. quotes 33 articles on different fNIRS basics technical developments 44 reviews applications published last eight years. The huge number review about a wide spectrum topics field cognitive social sciences, neuroimaging research, medicine testifies to maturity achieved by this non-invasive optical vascular-based technique. Today, has started be utilized healthy subjects while moving freely naturalistic settings. Further instrumental are expected done near future fully satisfy latter important aspect. In addition, procedures, including correction methods for strong extracranial interferences, need standardized before using as clinical tool individual patients. New research avenues such interactive neurosciences, cortical activation modulated type sport performance, during neurofeedback training highlighted.

Language: Английский

Citations

96
Prefrontal cortical activation measured by fNIRS during walking: effects of age, disease and secondary task DOI Creative Commons
Paulo Henrique Silva Pelicioni,

Mylou Tijsma,

Stephen R. Lord

et al.

PeerJ, Journal Year: 2019, Volume and Issue: 7, P. e6833 - e6833

Published: May 3, 2019

Cognitive processes are required during walking to appropriately respond environmental and task demands. There now many studies that have used functional Near-Infrared Spectroscopy (fNIRS) record brain activation investigate neural bases of cognitive contributions in gait. The aim this systematic review was summarize the published research regarding Prefrontal cortical (PFC) patterns simple complex tasks young adults, older adults clinical groups with balance disorders using fNIRS. Our secondary evaluate each included study based on methodological reporting criteria important for good data quality.We conducted searches June 2018 four databases: Embase, PubMed, Scopus PsycINFO. strategy search was: (((((near infrared spectroscopy) OR near nirs) fnirs) AND (((gait) walking) locomotion) (((((young) adult) older) elderly) NOT children)) (((Brain) cortex) cortical) our search. papers met specific criteria: (i) fNIRS measure PFC patterns; (ii) (simple complex) and; (iii) assessed people, people and/or disorders.Thirty five (describing 75 comparisons) 308 retrieved through inclusion criteria. Based 6 considerations, 20 were high quality, 10 medium quality 5 low quality. Eleven/20 comparisons 23/37 15/18 reported increased complexity. majority verbal fluency, counting backwards or motor increases (83%, 64% 58% these studies, respectively). In contrast, no found visual activation.Increased most common involved walks comprising fluency arithmetic tasks. Clinical generally showed irrespective type performed which suggests require more attentional resources safe walking. Systematic registration number: PROSPERO 2017 - CRD42017059501.

Language: Английский

Citations

90
Prefrontal Cortex Activity During Walking: Effects of Aging and Associations With Gait and Executive Function DOI
Priscila Nóbrega‐Sousa, Lílian Teresa Bucken Gobbi, Diego Orcioli‐Silva

et al.

Neurorehabilitation and neural repair, Journal Year: 2020, Volume and Issue: 34(10), P. 915 - 924

Published: Aug. 31, 2020

Background Declines in gait parameters are common with aging and more pronounced tasks increased executive demand. However, the neural correlates of age-related impairments not fully understood yet. Objectives To investigate ( a) effects on prefrontal cortex (PFC) activity during usual walking, obstacle crossing dual-task walking b) association between PFC measures function. Methods Eighty-eight healthy individuals were distributed into 6 age-groups: 20-25 (G20), 30-35 (G30), 40-45 (G40), 50-55 (G50), 60-65 (G60), 70-75 years (G70). Participants walked overground under 3 conditions: crossing, walking. Changes oxygenated deoxygenated hemoglobin recorded using functional near-infrared spectroscopy. Gait spatiotemporal assessed an electronic walkway. Executive function was through validated tests. Results Between-group differences observed for all conditions. Multiple groups (ie, G30, G50, G60, G70) showed at least one Young adults (G20 G30) had lowest levels while G60 highest levels. Only G70 reduced (which walking). related to Conclusions Aging causes a gradual increase This compensatory mechanism may reach resource ceiling 70s, when limits its efficiency observed.

Language: Английский

Citations

88
Brain activity during dual task gait and balance in aging and age-related neurodegenerative conditions: A systematic review DOI
Melike Kahya, Sanghee Moon, Maud Ranchet

et al.

Experimental Gerontology, Journal Year: 2019, Volume and Issue: 128, P. 110756 - 110756

Published: Oct. 22, 2019

Language: Английский

Citations

77
Functional Near-Infrared Spectroscopy to Study Cerebral Hemodynamics in Older Adults During Cognitive and Motor Tasks: A Review DOI Creative Commons

Cristina Udina,

Stella Avtzi, Turgut Durduran

et al.

Frontiers in Aging Neuroscience, Journal Year: 2020, Volume and Issue: 11

Published: Jan. 20, 2020

The integrity of the frontal areas brain, specifically prefrontal cortex, are critical to preserve cognition and mobility in late life. Prefrontal cortex regions involved executive functions gait control have been related performance dual-tasks. Dual-task assessment may help identify older adults at risk negative health outcomes. As an alternative neuroimaging techniques that do not allow during actual motion, functional Near-Infrared Spectroscopy is a non-invasive technique can assess neural activation through measurement cortical oxygenated deoxygenated hemoglobin levels, while person performing motor task natural environment as well cognitive tasks. aim this review was describe use study lobe hemodynamics cognitive, dual-tasks adults. From 46 included publications, 20 studies used only tasks, 3 tasks 23 Our findings suggest detects changes (cognitively healthy mild impairment), especially In both comparison between younger adults, people with different neurological conditions, compared healthier controls, seems experience higher activation, which could be interpreted context proposed inefficiency limited capacity models. Further research needed establish standardized protocols, cerebral hemodynamic systemic conditions might influence explore its role predicting incident outcomes such dementia.

Language: Английский

Citations

76