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Functional near-infrared spectroscopy

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https://www.readbyqxmd.com/read/28326623/neurophysiological-assessment-of-acute-pain-in-infants-a-scoping-review-of-research-methods
#1
REVIEW
B Benoit, R Martin-Misener, A Newman, M Latimer, M Campbell-Yeo
A systematic scoping search to describe the neurophysiological methods used in infant acute pain assessment research was conducted. Of the 2411 abstracts screened, 19 articles were retained. Nine studies utilized near infrared spectroscopy (NIRS), two utilized functional magnetic resonance imaging (fMRI), and eight utilized electroencephalography (EEG). There was methodological variability in studies utilizing NIRS, whereas EEG and fMRI studies reported consistent methods. Of the eight EEG studies, six identified a nociceptive specific event-related potential...
March 22, 2017: Acta Paediatrica
https://www.readbyqxmd.com/read/28324790/a-new-approach-to-estimating-the-evoked-hemodynamic-response-applied-to-dual-channel-functional-near-infrared-spectroscopy
#2
Reza Arefi Shirvan, Seyed Kamaledin Setarehdan, Ali Motie Nasrabadi
BACKGROUND: Brain activity can be measured non-invasively by means of functional near-infrared spectroscopy (fNIRS) which records hemodynamics of the brain tissue. Sensitivity of fNIRS to the brain activity is however being affected by natural physiological brain hemodynamics (systemic interferences). Functional hemodynamic signal extraction from physiological interferences still remains a challenging task. NEW METHOD: This paper presents a novel effective algorithm for real-time physiological interference reduction and recovery of the evoked brain activity using a dual channel fNIRS system...
March 18, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28324168/the-effect-of-eccentric-exercise-with-blood-flow-restriction-on-neuromuscular-activation-microvascular-oxygenation-and-the-repeated-bout-effect
#3
Jakob D Lauver, Trent E Cayot, Timothy Rotarius, Barry W Scheuermann
PURPOSE: To examine the effect of low-intensity eccentric contractions with and without blood flow restriction (BFR) on microvascular oxygenation, neuromuscular activation, and the repeated bout effect (RBE). METHODS: Participants were randomly assigned to either low-intensity (LI), low-intensity with BFR (LI-BFR), or a control (CON) group. Participants in LI and LI-BFR performed a preconditioning bout of low-intensity eccentric exercise prior to about of maximal eccentric exercise...
March 21, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28323801/predicting-acute-compartment-syndrome-pacs-the-role-of-continuous-monitoring
#4
Andrew H Schmidt, Michael J Bosse, Katherine P Frey, Robert V OʼToole, Daniel J Stinner, Daniel O Scharfstein, Vadim Zipunnikov, Ellen J MacKenzie
The diagnosis of acute compartment syndrome (ACS) is a common clinical challenge among patients who sustain high-energy orthopaedic trauma, largely because no validated criteria exist to reliably define the presence of the condition. In the absence of validated diagnostic standards, concern for the potential clinical and medicolegal impact of a missed compartment syndrome may result in the potential overuse of fasciotomy in "at-risk" patients. The goal of the Predicting Acute Compartment Syndrome Study was to develop a decision rule for predicting the likelihood of ACS that would reduce unnecessary fasciotomies while guarding against potentially missed ACS...
April 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28294282/transient-increase-in-systemic-interferences-in-the-superficial-layer-and-its-influence-on-event-related-motor-tasks-a-functional-near-infrared-spectroscopy-study
#5
Isao Nambu, Takuya Ozawa, Takanori Sato, Takatsugu Aihara, Yusuke Fujiwara, Yohei Otaka, Rieko Osu, Jun Izawa, Yasuhiro Wada
No abstract text is available yet for this article.
March 1, 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28293062/near-infrared-spectroscopy-reveals-abnormal-hemodynamics-in-the-left-dorsolateral-prefrontal-cortex-of-menopausal-depression-patients
#6
Xiang-Yun Ma, Yong-Jun Wang, Bo Xu, Kun Feng, Gao-Xiang Sun, Xiao-Qian Zhang, Xiao-Min Liu, Chen-Yu Shen, Xia-Jin Ren, Jing-Jing Sun, Po-Zi Liu
Background/Objective. Menopausal depression (MD) is characterized by depressive symptoms along with hormonal fluctuations. We investigate brain function alteration between major depressive disorder (MDD) and MD. Methods. The difference in oxygenated hemoglobin (Oxy-Hb) for the prefrontal cortex (PFC) was compared retrospectively among 90 females presented with 30 MDD, 30 MD, and 30 healthy controls (HCs) using verbal fluency task (VFT) with near-infrared spectroscopy (NIRS). Results. We observed a significant difference in Oxy-Hb alteration in the left dorsolateral PFC (DLPFC) using VFT with NIRS (channel 18, P = 0...
2017: Disease Markers
https://www.readbyqxmd.com/read/28292650/frontal-and-temporal-cortical-functional-recovery-after-electroconvulsive-therapy-for-depression-a-longitudinal-functional-near-infrared-spectroscopy-study
#7
Jinichi Hirano, Akihiro Takamiya, Bun Yamagata, Syogo Hotta, Yukiko Miyasaka, Shenghong Pu, Akira Iwanami, Hiroyuki Uchida, Masaru Mimura
While the efficacy and tolerability of electroconvulsive therapy (ECT) for depression has been well established, the acute effects of ECT on brain function remain unclear. Particularly, although cognitive dysfunction has been consistently observed after ECT, little is known about the extent and time course of ECT-induced brain functional changes, as observed during cognitive tasks. Considering the acute antidepressant effects of ECT on depression, aberrant brain functional responses during cognitive tasks in patients with depression may improve immediately after this treatment...
February 22, 2017: Journal of Psychiatric Research
https://www.readbyqxmd.com/read/28286404/applications-of-optical-neuroimaging-in-usability-research
#8
Audrey P Hill, Corey J Bohil
In this article we review recent and potential applications of optical neuroimaging to human factors and usability research. We focus specifically on functional near-infrared spectroscopy (fNIRS) because of its cost-effectiveness and ease of implementation. Researchers have used fNIRS to assess a range of psychological phenomena relevant to human factors, such as cognitive workload, attention, motor activity, and more. It offers the opportunity to measure hemodynamic correlates of mental activity during task completion in human factors and usability studies...
April 2016: Ergonomics in Design: the Magazine of Human Factors Applications
https://www.readbyqxmd.com/read/28281067/changes-in-structural-characteristics-and-metal-speciation-for-biochar-exposure-in-typic-udic-ferrisols
#9
Qi Lin, Xin Xu, Qian Chen, Jing Fang, Xiaodong Shen, Lijuan Zhang
Recent studies on biochars confirmed their potential benefits in improving soil fertility and sequestrating contaminants. However, little information on the changes in structural characteristics and metal speciation of biochars after exposure to soils is currently available. The aim of this study was to use double experimental bags to study the transformation of ozonized biochars derived from poultry manure and drying sludge (denoted PB and SB, respectively) in typic udic ferrisols. The carbon and sulfur functional groups and chemical characteristics of the biochars were determined using spectroscopic techniques, such as Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and near-edge X-ray absorption fine structure spectroscopy spectroscopy, combined with chemical extractions...
March 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28278240/neural-correlates-of-conflict-between-gestures-and-words-a-domain-specific-role-for-a-temporal-parietal-complex
#10
J Adam Noah, Swethasri Dravida, Xian Zhang, Shaul Yahil, Joy Hirsch
The interpretation of social cues is a fundamental function of human social behavior, and resolution of inconsistencies between spoken and gestural cues plays an important role in successful interactions. To gain insight into these underlying neural processes, we compared neural responses in a traditional color/word conflict task and to a gesture/word conflict task to test hypotheses of domain-general and domain-specific conflict resolution. In the gesture task, recorded spoken words ("yes" and "no") were presented simultaneously with video recordings of actors performing one of the following affirmative or negative gestures: thumbs up, thumbs down, head nodding (up and down), or head shaking (side-to-side), thereby generating congruent and incongruent communication stimuli between gesture and words...
2017: PloS One
https://www.readbyqxmd.com/read/28269689/designing-and-testing-a-wearable-wireless-fnirs-patch
#11
Mohammadreza Abtahi, Gozde Cay, Manob Jyoti Saikia, Kunal Mankodiya
Optical brain monitoring using near infrared (NIR) light has got a lot of attention in order to study the complexity of the brain due to several advantages as oppose to other methods such as EEG, fMRI and PET. There are a few commercially available functional NIR spectroscopy (fNIRS) brain monitoring systems, but they are still non-wearable and pose difficulties in scanning the brain while the participants are in motion. In this work, we present our endeavors to design and test a low-cost, wireless fNIRS patch using NIR light sources at wavelengths of 770 and 830nm, photodetectors and a microcontroller to trigger the light sources, read photodetector's output and transfer data wirelessly (via Bluetooth) to a smart-phone...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269424/mental-stress-grading-based-on-fnirs-signals
#12
Fares Al-Shargie, Tong Boon Tang, Masashi Kiguchi
In this study, we propose functional near infrared spectroscopy (fNIRS) to objectively grade different levels of mental stress. The levels of stress were set based on the difficulty of arithmetic task, time pressure and negative feedback about peer performance. We examined the proposed approach on twelve human subjects using the Montreal Imaging Stress Task. The experiment results revealed a reduction in cortical activation at prefrontal cortex when stressed, and the differences in hemodynamic response between control condition and under stress were significant for arithmetic difficulty level one, two and three, respectively, (p = 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28269110/assessment-of-mental-workload-by-eeg-fnirs
#13
Haleh Aghajani, Ahmet Omurtag
We investigated the use of a multimodal functional neuroimaging system in quantifying mental workload of healthy human volunteers. We recorded behavioral performance measures as well as electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS) simultaneously from subjects performing n-back tasks. The EEG and fNIRS signals were used in feature generation and classification offline using support vector machines. We examined the classification accuracy of three distinct systems: EEG based; fNIRS based; and Hybrid, which contained features from the first two systems as based on their interactions...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268630/decoding-movement-direction-using-phase-space-analysis-of-hemodynamic-responses-to-arm-movements-based-on-functional-near-infrared-spectroscopy
#14
Nicoladie Tam, Luca Pollonini, George Zouridakis
In this study we applied phase-space analysis on the hemodynamic signals recorded from the motor cortex of human subjects using functional near infrared spectroscopy (fNIRS) to decode the direction of intentional hand movements. Our goal is to develop a brain-computer-interface (BCI) based on optical imaging that can control a wheelchair. To establish the relationship between the hemodynamic response and movement direction, participants were asked to perform repetitive arm movements in two orthogonal directions (right-left and front-back) on a horizontal plane, while the time course of the oxy-hemoglobin (oxy-Hb) and deoxy-hemoglobin (deoxy-Hb) responses were recorded...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28268586/analytical-approach-to-the-temporal-changes-in-nirs-signals-to-separate-hemodynamic-change-from-brain-activity
#15
K Fukuda, H Takemoto, A Ikeda
In brain function measurements by near-infrared spectroscopy (NIRS), we focus on the temporal changes in the oxygenated and deoxygenated hemoglobin concentrations and propose an analytical approach to the temporal changes of the hemoglobin concentrations' cross-correlation coefficient in the brain functional signals. The cross-correlation coefficient between the oxygenated and deoxygenated hemoglobin concentrations shows negative values for brain activity and positive values for hemodynamic changes. Experiments with a 16-channel functional NIRS system show that our proposed approach clarifies the interpretation of the measured NIRS signals and it can be used to estimate the influence of hemodynamic change on brain activity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28266747/spatial-coregistration-of-functional-near-infrared-spectroscopy-to-brain-mri
#16
Michelle Chen, Helena M Blumen, Meltem Izzetoglu, Roee Holtzer
BACKGROUND AND PURPOSE: Traditional neuroimaging techniques restrict movement and make it difficult to study the processes that require oral, upper limb, or lower limb motor execution. Functional near-infrared spectroscopy (fNIRS) is an optical neuroimaging modality that measures brain oxygenation and permits movement during data acquisition. A key limitation of fNIRS, however, is the lack of a standard method to coregister quantitative fNIRS measurements to structural images such as magnetic resonance imaging (MRI)...
March 7, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28266320/different-functioning-of-prefrontal-cortex-predicts-treatment-response-after-a-selective-serotonin-reuptake-inhibitor-treatment-in-patients-with-major-depression
#17
Koji Masuda, Mari Nakanishi, Kana Okamoto, Chiwa Kawashima, Harumi Oshita, Ayako Inoue, Fuku Takita, Toshihiko Izumi, Yoshinobu Ishitobi, Haruka Higuma, Masayuki Kanehisa, Taiga Ninomiya, Yoshinori Tanaka, Jotaro Akiyoshi
BACKGROUND: Major depressive disorder (MDD) is often resistant to treatment with usual approaches. Patients with MDD have shown hypofunction of the frontotemporal cortex in verbal fluency test (VFT)-related near-infrared spectroscopy (NIRS). METHODS: We examined whether the reactions to drug treatment in treatment-naive patients with MDD could be predicted by NIRS outcomes at the initial investigation. All subjects underwent psychological testing to determine levels of anxiety and depression...
March 4, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28265475/improvement-and-neuroplasticity-after-combined-rehabilitation-to-forced-grasping
#18
Michiko Arima, Atsuko Ogata, Kazumi Kawahira, Megumi Shimodozono
The grasp reflex is a distressing symptom but the need to treat or suppress it has rarely been discussed in the literature. We report the case of a 17-year-old man who had suffered cerebral infarction of the right putamen and temporal lobe 10 years previously. Forced grasping of the hemiparetic left upper limb was improved after a unique combined treatment. Botulinum toxin type A (BTX-A) was first injected into the left biceps, wrist flexor muscles, and finger flexor muscles. Forced grasping was reduced along with spasticity of the upper limb...
2017: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/28262138/prefrontal-oxygenation-during-verbal-fluency-and-cognitive-function-in-adolescents-with-bipolar-disorder-type-ii
#19
Yasuki Ono, Mitsuru Kikuchi, Hideo Nakatani, Masako Murakami, Manami Nishisaka, Tomoko Muramatsu, Toshio Munesue, Yoshio Minabe
Evaluation of depressive states in children can be challenging. Most of the studies that have investigated cognitive function and cerebral blood volume changes using functional MRI (fMRI) in bipolar disorder (BD) have been confined to BDI or heterogeneous cohorts with attention-deficit/hyperactivity disorder (ADHD). This study investigated cognitive functions in adolescents with BDII and without ADHD using near-infrared spectroscopy (NIRS) and a Das-Naglieri Cognitive Assessment System (DN-CAS). Ten patients with BDII and without ADHD symptoms and 10 age- and gender-matched healthy controls were enrolled in the present study...
February 2017: Asian Journal of Psychiatry
https://www.readbyqxmd.com/read/28261084/hybrid-eeg-fnirs-based-eight-command-decoding-for-bci-application-to-quadcopter-control
#20
Muhammad Jawad Khan, Keum-Shik Hong
In this paper, a hybrid electroencephalography-functional near-infrared spectroscopy (EEG-fNIRS) scheme to decode eight active brain commands from the frontal brain region for brain-computer interface is presented. A total of eight commands are decoded by fNIRS, as positioned on the prefrontal cortex, and by EEG, around the frontal, parietal, and visual cortices. Mental arithmetic, mental counting, mental rotation, and word formation tasks are decoded with fNIRS, in which the selected features for classification and command generation are the peak, minimum, and mean ΔHbO values within a 2-s moving window...
2017: Frontiers in Neurorobotics
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