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Functional near-infrared spectroscopy

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https://www.readbyqxmd.com/read/28804712/virtual-and-actual-humanoid-robot-control-with-four-class-motor-imagery-based-optical-brain-computer-interface
#1
Alyssa M Batula, Youngmoo E Kim, Hasan Ayaz
Motor-imagery tasks are a popular input method for controlling brain-computer interfaces (BCIs), partially due to their similarities to naturally produced motor signals. The use of functional near-infrared spectroscopy (fNIRS) in BCIs is still emerging and has shown potential as a supplement or replacement for electroencephalography. However, studies often use only two or three motor-imagery tasks, limiting the number of available commands. In this work, we present the results of the first four-class motor-imagery-based online fNIRS-BCI for robot control...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28802090/assessment-of-the-dynamics-of-human-glymphatic-system-by-near-infrared-spectroscopy-nirs
#2
Teemu Myllylä, Markus Harju, Vesa Korhonen, Alexander Bykov, Vesa Kiviniemi, Igor Meglinski
Fluctuations in brain water content has attracted increasing interest, particularly as regards studies of the glymphatic system, which is connected with the complex organisation of dural lymphatic vessels, responsible for cleaning tissue. Disturbances of glymphatic circulation are associated with several brain disorders, including dementia. This paper introduces an approach to non-invasive measurement of water dynamics in the human brain utilizing near-infrared spectroscopy (NIRS). We demonstrate the possibility to sense dynamic variations of water content between the skull and grey matter, for instance, in the subarachnoid space...
August 12, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28800981/near-infrared-spectroscopy-in-adult-cardiac-surgery-patients-a-systematic-review-and-meta-analysis
#3
Matthew J Chan, Tricia Chung, Neil J Glassford, Rinaldo Bellomo
OBJECTIVES: To identify the normal baseline preoperative range of cerebral tissue oxygen saturation (SctO2) derived using near-infrared spectroscopy (NIRS) and the efficacy of perioperative interventions designed to modulate SctO2 in cardiac surgical patients. DESIGN: Systematic review and meta-analysis of relevant randomized controlled trials (RCTs) extracted from the Medline, Embase, and Cochrane Central Register of Controlled Trials databases. SETTING: Hospitals performing cardiac surgery...
August 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28798694/decomposing-multifractal-crossovers
#4
Zoltan Nagy, Peter Mukli, Peter Herman, Andras Eke
Physiological processes-such as, the brain's resting-state electrical activity or hemodynamic fluctuations-exhibit scale-free temporal structuring. However, impacts common in biological systems such as, noise, multiple signal generators, or filtering by transport function, result in multimodal scaling that cannot be reliably assessed by standard analytical tools that assume unimodal scaling. Here, we present two methods to identify breakpoints or crossovers in multimodal multifractal scaling functions. These methods incorporate the robust iterative fitting approach of the focus-based multifractal formalism (FMF)...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28798675/multisubject-learning-for-mental-workload-classification-using-concurrent-eeg-fnirs-and-physiological-measures
#5
Yichuan Liu, Hasan Ayaz, Patricia A Shewokis
An accurate measure of mental workload level has diverse neuroergonomic applications ranging from brain computer interfacing to improving the efficiency of human operators. In this study, we integrated electroencephalogram (EEG), functional near-infrared spectroscopy (fNIRS), and physiological measures for the classification of three workload levels in an n-back working memory task. A significantly better than chance level classification was achieved by EEG-alone, fNIRS-alone, physiological alone, and EEG+fNIRS based approaches...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28797920/prefrontal-activation-during-a-working-memory-task-differs-between-patients-with-unipolar-and-bipolar-depression-a-preliminary-exploratory-study
#6
Yue Zhu, Wenxiang Quan, Huali Wang, Yantao Ma, Jun Yan, Hua Zhang, Wentian Dong, Xin Yu
BACKGROUND: To identify bipolar disorder during the initial stages of a depressive episode has always been a great clinical challenge. Patterns of functional brain activity may underlie the differences in the neural mechanisms of bipolar depression (BD) and unipolar depression (UD). This study aimed to investigate the differences in neural activity between BD and UD patients during executive task. METHODS: We performed a 52-channel near-infrared spectroscopy (NIRS) scan in 39 patients with BD, 35 patients with UD, and 36 healthy controls (HCs)...
July 18, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28790910/hybrid-brain-computer-interface-techniques-for-improved-classification-accuracy-and-increased-number-of-commands-a-review
#7
REVIEW
Keum-Shik Hong, Muhammad Jawad Khan
In this article, non-invasive hybrid brain-computer interface (hBCI) technologies for improving classification accuracy and increasing the number of commands are reviewed. Hybridization combining more than two modalities is a new trend in brain imaging and prosthesis control. Electroencephalography (EEG), due to its easy use and fast temporal resolution, is most widely utilized in combination with other brain/non-brain signal acquisition modalities, for instance, functional near infrared spectroscopy (fNIRS), electromyography (EMG), electrooculography (EOG), and eye tracker...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28790823/a54-peptide-mediated-functionalized-gold-nanocages-for-targeted-delivery-of-dox-as-a-combinational-photothermal-chemotherapy-for-liver-cancer
#8
Shengnan Huang, Chunming Li, Weiping Wang, Huanjie Li, Zhi Sun, Chengzhi Song, Benyi Li, Shaofeng Duan, Yurong Hu
The combination of photothermal therapy and chemotherapy (photothermal-chemotherapy) is a promising strategy for cancer therapy. Gold nanocages (AuNCs), with hollow and porous structures and unique optical properties, have become a rising star in the field of drug delivery. Here, we designed a novel targeted drug delivery system based on functionalized AuNCs and evaluated their therapeutic effects in vitro and in vivo. We then loaded doxorubicin into this promising system, designated as DHTPAuNCs consisting of hyaluronic acid-grafted and A54 peptide-targeted PEGylated AuNCs...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28790399/gender-difference-in-spontaneous-deception-a-hyperscanning-study-using-functional-near-infrared-spectroscopy
#9
Mingming Zhang, Tao Liu, Matthew Pelowski, Dongchuan Yu
Previous studies have demonstrated that the neural basis of deception involves a network of regions including the medial frontal cortex (MFC), superior temporal sulcus (STS), temporo-parietal junction (TPJ), etc. However, to test the actual activity of the brain in the act of deceptive practice itself, existing studies have mainly adopted paradigms of passive deception, where participants are told to lie in certain conditions, and have focused on intra-brain mechanisms in single participants. In order to examine the neural substrates underlying more natural, spontaneous deception in real 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 two-person gambling card-game...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28778021/neural-correlates-of-obstacle-negotiation-in-older-adults-an-fnirs-study
#10
Michelle Chen, Sarah Pillemer, Sarah England, Meltem Izzetoglu, Jeannette R Mahoney, Roee Holtzer
Older adults are less efficient at avoiding obstacles compared to young adults, especially under attention-demanding conditions. Using functional near-infrared-spectroscopy (fNIRS), recent studies implicated the prefrontal cortex (PFC) in cognitive control of locomotion, notably under dual-task walking conditions. The neural substrates underlying Obstacle Negotiation (ON), however, have not been established. The current study determined the role of the PFC in ON during walking in seniors. Non-demented older adults (n=90; mean age=78...
July 18, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28769781/enhancing-classification-performance-of-functional-near-infrared-spectroscopy-brain-computer-interface-using-adaptive-estimation-of-general-linear-model-coefficients
#11
Nauman Khalid Qureshi, Noman Naseer, Farzan Majeed Noori, Hammad Nazeer, Rayyan Azam Khan, Sajid Saleem
In this paper, a novel methodology for enhanced classification of functional near-infrared spectroscopy (fNIRS) signals utilizable in a two-class [motor imagery (MI) and rest; mental rotation (MR) and rest] brain-computer interface (BCI) is presented. First, fNIRS signals corresponding to MI and MR are acquired from the motor and prefrontal cortex, respectively, afterward, filtered to remove physiological noises. Then, the signals are modeled using the general linear model, the coefficients of which are adaptively estimated using the least squares technique...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28769775/measuring-mental-workload-with-eeg-fnirs
#12
Haleh Aghajani, Marc Garbey, Ahmet Omurtag
We studied the capability of a Hybrid functional neuroimaging technique to quantify human mental workload (MWL). We have used electroencephalography (EEG) and functional near-infrared spectroscopy (fNIRS) as imaging modalities with 17 healthy subjects performing the letter n-back task, a standard experimental paradigm related to working memory (WM). The level of MWL was parametrically changed by variation of n from 0 to 3. Nineteen EEG channels were covering the whole-head and 19 fNIRS channels were located on the forehead to cover the most dominant brain region involved in WM...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28763376/effects-of-task-language-and-second-language-proficiency-on-the-neural-correlates-of-phonemic-fluency-in-native-japanese-speakers-a-functional-near-infrared-spectroscopy-study
#13
Greggory J Wroblewski, Koji Matsuo, Keiko Hirata, Toshio Matsubara, Kenichiro Harada, Yoshifumi Watanabe, Koh Shinoda
Data collected during a phonemic fluency task (or 'FAS test'), a standard component of neuropsychological batteries for assessment of cognitive deficits, may be language-dependent and may differ depending on second-language proficiency. The unique orthographic/phonological system of the task language, and the reported cognitive advantages inherent to bilinguals, may each influence the task's neural correlates. However, language background is not currently assessed in most studies testing phonemic fluency. Here, we used 52-channel functional near-infrared spectroscopy in college-aged native-Japanese subjects to examine functional changes in oxygenated hemoglobin elicited during a phonemic fluency task performed in Japanese and in English...
July 31, 2017: Neuroreport
https://www.readbyqxmd.com/read/28759852/the-role-of-different-network-modifying-cations-on-the-speciation-of-the-co-2-complex-in-silicates-and-implication-in-the-investigation-of-historical-glasses
#14
Cristina Fornacelli, Andrea Ceglia, Susanna Bracci, Marcia Vilarigues
In the last decades the speciation of the cobalt complex in a glass matrix has been extensively studied. Bivalent cobalt ions in glasses of different composition commonly adopt a tetrahedral coordination, though hexa- or penta-coordinated species are also possible. Changes in the absorbance spectrum of Co-doped glasses were attested in previous studies according to the introduction of different modifying cations. A shifting of the first sub-band characterizing the typical triplets of tetrahedral Co(2+) ions in both the visible and near infrared regions was observed, but discrepancies in literature suggested a relevant role of glass composition on the definition of the optical signature of cobalt...
July 22, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28758809/development-and-testing-an-online-near-infrared-spectroscopy-brain-computer-interface-tailored-to-an-individual-with-severe-congenital-motor-impairments
#15
Larissa C Schudlo, Tom Chau
PURPOSE: For non-verbal individuals, brain-computer interfaces (BCIs) are a potential means of communication. Near-infrared spectroscopy (NIRS) is a brain-monitoring modality that has been considered for BCIs. To date, limited NIRS-BCI testing has involved online classification, particularly with individuals with severe motor impairments. MATERIALS AND METHODS: We tested an online NIRS-BCI developed for a non-verbal individual with severe congenital motor impairments...
July 31, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28756548/optimized-statistical-parametric-mapping-procedure-for-nirs-data-contaminated-by-motion-artifacts-neurometric-analysis-of-body-schema-extension
#16
Satoshi Suzuki
This study investigated the spatial distribution of brain activity on body schema (BS) modification induced by natural body motion using two versions of a hand-tracing task. In Task 1, participants traced Japanese Hiragana characters using the right forefinger, requiring no BS expansion. In Task 2, participants performed the tracing task with a long stick, requiring BS expansion. Spatial distribution was analyzed using general linear model (GLM)-based statistical parametric mapping of near-infrared spectroscopy data contaminated with motion artifacts caused by the hand-tracing task...
July 29, 2017: Brain Informatics
https://www.readbyqxmd.com/read/28755870/use-of-near-infrared-spectroscopy-in-the-investigation-of-brain-activation-during-cognitive-aging-a-systematic-review-of-an-emerging-area-of-research
#17
REVIEW
Nounagnon F Agbangla, Michel Audiffren, Cédric T Albinet
The cognitive neuroscience of aging is a growing and stimulating research area. The development of neuroimaging techniques in the past two decades has considerably increased our understanding of the brain mechanisms that might underlie cognitive performance and resulting changes due to normal aging. Beside traditional metabolic neuroimaging techniques, such as Positron Emission Tomography and functional Magnetic Resonance Imaging, near infrared spectroscopy (NIRS), an optical imaging technique allowing to monitor real-time cerebral blood oxygenation, has gained recent interest in this field...
July 26, 2017: Ageing Research Reviews
https://www.readbyqxmd.com/read/28752765/gold-embedded-hollow-silica-nanogolf-balls-for-imaging-and-photothermal-therapy
#18
Woraphong Janetanakit, Liping Wang, Karla Santacruz-Gomez, Preston B Landon, Paul L Sud, Nirav Patel, Grace Jang, Malvika Jain, Alice Yepremyan, Sami A Kazmi, Deependra K Ban, Feng Zhang, Ratnesh Lal
Hybrid nanocarriers with multifunctional properties have wide therapeutic and diagnostic applications. We have constructed hollow silica nanogolf balls (HGBs) and gold-embedded hollow silica nanogolf balls (Au@SiO2 HGBs) using the layer-by-layer approach on a symmetric polystyrene (PS) Janus template; the template consists of smaller PS spheres attached to an oppositely charged large PS core. ζ Potential measurement supports the electric force-based template-assisted synthesis mechanism. Electron microscopy, UV-vis, and near-infrared (NIR) spectroscopy show that HGBs or Au@SiO2 HGBs are composed of a porous silica shell with an optional dense layer of gold nanoparticles embedded in the silica shell...
August 8, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28749554/high-energy-resolution-x-ray-absorption-spectroscopy-for-identification-of-reactive-surface-species-on-supported-single-site-iridium-catalysts
#19
Adam S Hoffman, Dimosthenis Sokaras, Shengjie Zhang, Louise M Debefve, Chia-Yu Fang, Alessandro Gallo, Thomas Kroll, David A Dixon, Simon R Bare, Bruce C Gates
We report high-energy-resolution X-ray absorption spectroscopy detection of ethylene and CO ligands adsorbed on catalytically active iridium centers isolated on zeolite HY and on MgO supports. The data are supported by density functional theory and FEFF X-ray absorption near-edge modelling, together with infrared (IR) spectra. The results demonstrate that high-energy-resolution X-ray absorption spectra near the iridium LIII (2p3/2 ) edge provide clearly ascribable, distinctive signatures of the ethylene and CO ligands and illustrate effects of supports and other ligands...
June 9, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28744192/macroanatomical-landmarks-featuring-junctions-of-major-sulci-and-fissures-and-scalp-landmarks-based-on-the-international-10-10-system-for-analyzing-lateral-cortical-development-of-infants
#20
Daisuke Tsuzuki, Fumitaka Homae, Gentaro Taga, Hama Watanabe, Mie Matsui, Ippeita Dan
The topographic relationships between the macroanatomical structure of the lateral cortex, including sulci and fissures, and anatomical landmarks on the external surface of the head are known to be consistent. This allows the coregistration of EEG electrodes or functional near-infrared spectroscopy over the scalp with underlying cortical regions. However, limited information is available as to whether the topographic relationships are maintained in rapidly developing infants, whose brains and heads exhibit drastic growth...
2017: Frontiers in Neuroscience
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