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https://www.readbyqxmd.com/read/28944612/using-individual-functional-channels-of-interest-to-study-cortical-development-with-fnirs
#1
Lindsey J Powell, Ben Deen, Rebecca Saxe
Functional near-infrared spectroscopy (fNIRS) is a noninvasive neuroimaging technique that could be uniquely effective for investigating cortical function in human infants. However, prior efforts have been hampered by the difficulty of aligning arrays of fNIRS optodes placed on the scalp to anatomical or functional regions of underlying cortex. This challenge can be addressed by identifying channels of interest in individual participants, and then testing the reliability of those channels' response profiles in independent data...
September 24, 2017: Developmental Science
https://www.readbyqxmd.com/read/28937962/portable-functional-neuroimaging-as-an-environmental-epidemiology-tool-a-how-to-guide-for-the-use-of-fnirs-in-field-studies
#2
Joseph M Baker, Daniel Rojas-Valverde, Randall Gutiérrez, Mirko Winkler, Samuel Fuhrimann, Brenda Eskenazi, Allan L Reiss, Ana M Mora
The widespread application of functional neuroimaging within the field of environmental epidemiology has the potential to greatly enhance our understanding of how environmental toxicants affect brain function. Because many epidemiological studies take place in remote and frequently changing environments, it is necessary that the primary neuroimaging approach adopted by the epidemiology community be robust to many environments, easy to use, and, preferably, mobile. Here, we outline our use of functional near-infrared spectroscopy (fNIRS) to collect functional brain imaging data from Costa Rican farm workers enrolled in an epidemiological study on the health effects of chronic pesticide exposure...
September 21, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28931376/why-to-cooperate-is-better-than-to-compete-brain-and-personality-components
#3
Michela Balconi, Davide Crivelli, Maria Elide Vanutelli
BACKGROUND: Cooperation and competition were compared in the present study. Brain correlates (electroencephalography, EEG frequency band, delta, theta, alpha, and beta) and hemodynamic measure of functional near-infrared spectroscopy (fNIRS, O2Hb) were acquired during a joined cooperative (Experiment 1) or competitive (Experiment 2) task. Subjects were required to match each other's cognitive performance (cooperation) or to make better than others (competition) in terms of accuracy (error rate, ER) and response time (RT)...
September 20, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28928646/cortical-activation-during-action-observation-action-execution-and-interpersonal-synchrony-in-adults-a-functional-near-infrared-spectroscopy-fnirs-study
#4
Anjana N Bhat, Michael D Hoffman, Susanna L Trost, McKenzie L Culotta, Jeffrey Eilbott, Daisuke Tsuzuki, Kevin A Pelphrey
Introduction: Humans engage in Interpersonal Synchrony (IPS) as they synchronize their own actions with that of a social partner over time. When humans engage in imitation/IPS behaviors, multiple regions in the frontal, temporal, and parietal cortices are activated including the putative Mirror Neuron Systems (Iacoboni, 2005; Buxbaum et al., 2014). In the present study, we compared fNIRS-based cortical activation patterns across three conditions of action observation ("Watch" partner), action execution ("Do" on your own), and IPS (move "Together")...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28928644/near-infrared-spectroscopy-based-frontal-lobe-neurofeedback-integrated-in-virtual-reality-modulates-brain-and-behavior-in-highly-impulsive-adults
#5
Justin Hudak, Friederike Blume, Thomas Dresler, Florian B Haeussinger, Tobias J Renner, Andreas J Fallgatter, Caterina Gawrilow, Ann-Christine Ehlis
Based on neurofeedback (NF) training as a neurocognitive treatment in attention-deficit/hyperactivity disorder (ADHD), we designed a randomized, controlled functional near-infrared spectroscopy (fNIRS) NF intervention embedded in an immersive virtual reality classroom in which participants learned to control overhead lighting with their dorsolateral prefrontal brain activation. We tested the efficacy of the intervention on healthy adults displaying high impulsivity as a sub-clinical population sharing common features with ADHD...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28924568/convolutional-neural-network-for-high-accuracy-functional-near-infrared-spectroscopy-in-a-brain-computer-interface-three-class-classification-of-rest-right-and-left-hand-motor-execution
#6
Thanawin Trakoolwilaiwan, Bahareh Behboodi, Jaeseok Lee, Kyungsoo Kim, Ji-Woong Choi
The aim of this work is to develop an effective brain-computer interface (BCI) method based on functional near-infrared spectroscopy (fNIRS). In order to improve the performance of the BCI system in terms of accuracy, the ability to discriminate features from input signals and proper classification are desired. Previous studies have mainly extracted features from the signal manually, but proper features need to be selected carefully. To avoid performance degradation caused by manual feature selection, we applied convolutional neural networks (CNNs) as the automatic feature extractor and classifier for fNIRS-based BCI...
January 2018: Neurophotonics
https://www.readbyqxmd.com/read/28924567/rearrangeable-and-exchangeable-optical-module-with-system-on-chip-for-wearable-functional-near-infrared-spectroscopy-system
#7
Tsukasa Funane, Takashi Numata, Hiroki Sato, Shinsuke Hiraizumi, Yuichi Hasegawa, Hidenobu Kuwabara, Kiyoshi Hasegawa, Masashi Kiguchi
We developed a system-on-chip (SoC)-incorporated light-emitting diode (LED) and avalanche photodiode (APD) modules to improve the usability and flexibility of a fiberless wearable functional near-infrared spectroscopy (fNIRS) system. The SoC has a microprocessing unit and programmable circuits. The time division method and the lock-in method were used for separately detecting signals from different positions and signals of different wavelengths, respectively. Each module autonomously works for this time-divided-lock-in measurement with a high sensitivity for haired regions...
January 2018: Neurophotonics
https://www.readbyqxmd.com/read/28924566/comparison-of-oxyhemoglobin-and-deoxyhemoglobin-signal-reliability-with-and-without-global-mean-removal-for-digit-manipulation-motor-tasks
#8
Swethasri Dravida, Jack Adam Noah, Xian Zhang, Joy Hirsch
Functional near-infrared spectroscopy (fNIRS) could be well suited for clinical use, such as measuring neural activity before and after treatment; however, reliability and specificity of fNIRS signals must be ensured so that differences can be attributed to the intervention. This study compared the test-retest and longitudinal reliability of oxyhemoglobin and deoxyhemoglobin signals before and after spatial filtering. In the test-retest experiment, 14 participants were scanned on 2 days while performing four right-handed digit-manipulation tasks...
January 2018: Neurophotonics
https://www.readbyqxmd.com/read/28924564/signal-processing-of-functional-nirs-data-acquired-during-overt-speaking
#9
Xian Zhang, Jack Adam Noah, Swethasri Dravida, Joy Hirsch
Functional near-infrared spectroscopy (fNIRS) offers an advantage over traditional functional imaging methods [such as functional magnetic resonance imaging (fMRI)] by allowing participants to move and speak relatively freely. However, neuroimaging while actively speaking has proven to be particularly challenging due to the systemic artifacts that tend to be located in the critical brain areas. To overcome these limitations and enhance the utility of fNIRS, we describe methods for investigating cortical activity during spoken language tasks through refinement of deoxyhemoglobin (deoxyHb) signals with principal component analysis (PCA) spatial filtering to remove global components...
October 2017: Neurophotonics
https://www.readbyqxmd.com/read/28924563/functional-near-infrared-spectroscopy-in-movement-science-a-systematic-review-on-cortical-activity-in-postural-and-walking-tasks
#10
REVIEW
Fabian Herold, Patrick Wiegel, Felix Scholkmann, Angelina Thiers, Dennis Hamacher, Lutz Schega
Safe locomotion is a crucial aspect of human daily living that requires well-functioning motor control processes. The human neuromotor control of daily activities such as walking relies on the complex interaction of subcortical and cortical areas. Technical developments in neuroimaging systems allow the quantification of cortical activation during the execution of motor tasks. Functional near-infrared spectroscopy (fNIRS) seems to be a promising tool to monitor motor control processes in cortical areas in freely moving subjects...
October 2017: Neurophotonics
https://www.readbyqxmd.com/read/28919856/visualizing-hyperactivation-in-neurodegeneration-based-on-prefrontal-oxygenation-a-comparative-study-of-mild-alzheimer-s-disease-mild-cognitive-impairment-and-healthy-controls
#11
Kah Hui Yap, Wei Chun Ung, Esther G M Ebenezer, Nadira Nordin, Pui See Chin, Sandheep Sugathan, Sook Ching Chan, Hung Loong Yip, Masashi Kiguchi, Tong Boon Tang
Background: Cognitive performance is relatively well preserved during early cognitive impairment owing to compensatory mechanisms. Methods: We explored functional near-infrared spectroscopy (fNIRS) alongside a semantic verbal fluency task (SVFT) to investigate any compensation exhibited by the prefrontal cortex (PFC) in Mild Cognitive Impairment (MCI) and mild Alzheimer's disease (AD). In addition, a group of healthy controls (HC) was studied. A total of 61 volunteers (31 HC, 12 patients with MCI and 18 patients with mild AD) took part in the present study...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28916447/perception-of-caucasian-and-african-faces-in-5-to-9-month-old-caucasian-infants-a-functional-near-infrared-spectroscopy-study
#12
Susanna Timeo, Sabrina Brigadoi, Teresa Farroni
Race is an important perceptual cue for face perception. In adults, other-race faces are elaborated differently and remembered less well than own-race faces. Moreover, they show a different pattern of activation at the neural level. Developmental studies demonstrated that, during the first year of life, infants start to show the same behavioral pattern as adults in race perception. However, little is known about where and how in the brain other-race perception is elaborated in this population. The present study is the first to investigate the development of different neural responses to faces of different race in infants using functional near-infrared spectroscopy (fNIRS)...
September 12, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28914554/when-cooperation-goes-wrong-brain-and-behavioral-correlates-of-ineffective-joint-strategies-in-dyads
#13
Michela Balconi, Laura Gatti, Maria Elide Vanutelli
Human life is connoted by sophisticated interactions that involve not only single individuals, but larger social groups composed by members interacting each other. Cooperation secures a benefit to all the people engaged as well as important behaviors like helping, sharing, and acting prosocially. But what happens when the joint actions are not effective? In the present study we asked 24 participants paired in 12 dyads to cooperate during an attentional task in a way to synchronize their responses and obtain better outcomes...
September 15, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28914230/prefrontal-cortical-responses-in-children-with-prenatal-alcohol-related-neurodevelopmental-impairment-a-functional-near-infrared-spectroscopy-study
#14
Julie A Kable, Claire D Coles
OBJECTIVE: Disruption in the neural activation of the prefrontal cortex (PFC) in modulating arousal was explored in children with heavy prenatal alcohol exposure (PAE), who have known neurobehavioral impairment. METHODS: During a task that elicits frustration, functional near-infrared spectroscopy (fNIRS) was used to measure PFC activation, specifically levels of oxygenated (HBO) and deoxygenated (HBR) hemoglobin, in children with PAE (n=18) relative to typically developing Controls (n=12) and a Clinical Contrast group with other neurodevelopmental or behavioral problems (n=14)...
September 2, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28912697/brains-in-competition-improved-cognitive-performance-and-inter-brain-coupling-by-hyperscanning-paradigm-with-functional-near-infrared-spectroscopy
#15
Michela Balconi, Maria E Vanutelli
Hyperscanning brain paradigm was applied to competitive task for couples of subjects. Functional Near-Infrared Spectroscopy (fNIRS) and cognitive performance were considered to test inter-brain and cognitive strategy similarities between subjects (14 couples) during a joint-action. We supposed increased brain-to-brain coupling and improved cognitive outcomes due to joint-action and the competition. As supposed, the direct interaction between the subjects and the observed external feedback of their performance (an experimentally induced fictitious feedback) affected the cognitive performance with decreased Error Rates (ERs), and Response Times (RTs)...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28894759/differential-efficiency-of-transcutaneous-electrical-nerve-stimulation-in-dominant-versus-nondominant-hands-in-fibromyalgia-placebo-controlled-functional-near-infrared-spectroscopy-study
#16
Aykut Eken, Murat Kara, Bora Baskak, Ayşegül Baltacı, Didem Gökçay
Using functional near-infrared spectroscopy (fNIRS), modulation of hemodynamic responses by transcutaneous electrical nerve stimulation (TENS) during delivery of nociceptive stimulation was investigated in fibromyalgia (FM) patients and healthy controls for both hands. Two experiments were conducted: (1) median nerve stimulation with TENS and (2) painful stimulation using electronic von Frey filaments with TENS/placebo TENS. Mean [Formula: see text] brain activity was compared across groups and conditions using factorial ANOVA...
January 2018: Neurophotonics
https://www.readbyqxmd.com/read/28889923/social-risky-decision-making-reveals-gender-differences-in-the-tpj-a-hyperscanning-study-using-functional-near-infrared-spectroscopy
#17
Mingming Zhang, Tao Liu, Matthew Pelowski, Huibin Jia, Dongchuan Yu
Previous neuroscience studies have investigated neural correlates of risky decision-making in a single-brain frame during pseudo social (predominantly non face-to-face) contexts. To fully understand the risky decision-making behavior in more natural social interactions, the present study employed a functional near-infrared spectroscopy (fNIRS) hyperscanning technique to simultaneously measure pairs of participants' fronto-temporal activations in a face-to-face gambling card-game. The intra-brain results revealed that both those who identified as males and as females showed higher activations in their mPFC and in the inferior parts of the frontopolar area, as well as in the tempo-parietal junction (TPJ) in cases involving higher versus lower risk...
September 7, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28888891/investigating-the-role-of-temporal-lobe-activation-in-speech-perception-accuracy-with-normal-hearing-adults-an-event-related-fnirs-study
#18
Jessica Defenderfer, Anastasia Kerr-German, Mark Hedrick, Aaron T Buss
Functional near infrared spectroscopy (fNIRS) is a safe, non-invasive, relatively quiet imaging technique that is tolerant of movement artifact making it uniquely ideal for the assessment of hearing mechanisms. Previous research demonstrates the capacity for fNIRS to detect cortical changes to varying speech intelligibility, revealing a positive relationship between cortical activation amplitude and speech perception score. In the present study, we use an event-related design to investigate the hemodynamic response in the temporal lobe across different listening conditions...
September 6, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28867998/functional-magnetic-resonance-imaging-and-functional-near-infrared-spectroscopy-insights-from-combined-recording-studies
#19
REVIEW
Vanessa Scarapicchia, Cassandra Brown, Chantel Mayo, Jodie R Gawryluk
Although blood oxygen level dependent (BOLD) functional magnetic resonance imaging (fMRI) is a widely available, non-invasive technique that offers excellent spatial resolution, it remains limited by practical constraints imposed by the scanner environment. More recently, functional near infrared spectroscopy (fNIRS) has emerged as an alternative hemodynamic-based approach that possesses a number of strengths where fMRI is limited, most notably in portability and higher tolerance for motion. To date, fNIRS has shown promise in its ability to shed light on the functioning of the human brain in populations and contexts previously inaccessible to fMRI...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28864837/near-infrared-spectroscopy-nirs-and-vagus-somatosensory-evoked-potentials-vsep-in-the-early-diagnosis-of-alzheimer-s-disease-rationale-design-methods-and-first-baseline-data-of-the-vogel-study
#20
Thomas Polak, Martin J Herrmann, Laura D Müller, Julia B M Zeller, Andrea Katzorke, Matthias Fischer, Fabian Spielmann, Erik Weinmann, Leif Hommers, Martin Lauer, Andreas J Fallgatter, Jürgen Deckert
Functional near-infrared spectroscopy (fNIRS) and vagus somatosensory evoked potentials (VSEP) show deviant patterns in subjects with Alzheimer's disease (AD) compared to healthy controls. We now aimed at testing the predictive value of these methods in the early diagnosis of AD. The Vogel study is a prospective, observational, long-term follow-up study with three time points of investigation within 6 years. Residents of the city of Würzburg born between 1936 and 1941 were recruited. Every participant underwent physical, psychiatric, and laboratory examinations, and performed an intense neuropsychological testing as well as VSEP and NIRS according to the published procedures...
September 1, 2017: Journal of Neural Transmission
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