Oxygen Transport to Tissue X

Mochizuki, Masaji; Honig, Carl R.; Koyama, Tomiyasu; Goldstick, Thomas K.; Bruley, Duane F.

doi:10.1007/978-1-4615-9510-6

Cited by 17 publications

(11 citation statements)

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“…For each participant, we evaluated relative changes in oxy-Hb and deoxy-Hb signals from an arbitrary 0 baseline at the beginning of the measurement period in units of millimolar millimeter, 26 using the modified Beer-Lambert Law with a differential path-length factor of 6 (more details about the differential path-length factor could be found in Refs. [27][28][29][30][31]. For each participant, the rs-fNIRS data were collected for ∼11 min, and the participants were instructed to relax, keep their eyes closed, and remain awake.…”

Section: Data Acquisitionmentioning

confidence: 99%

Functional near-infrared spectroscopy evidence for the development of topological asymmetry between hemispheric brain networks from childhood to adulthood

et al. 2019

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Functional near-infrared spectroscopy evidence for the development of topological asymmetry between hemispheric brain networks from childhood to adulthood," Neurophoton. 6(2), 025005 (2019), Abstract. Cerebral asymmetry is considered an important marker of the successful development of the human brain. Recent studies have demonstrated topological asymmetries between structurally hemispheric networks in the human brain. However, it remains largely unknown whether and how the functionally topological asymmetries evolve from childhood to adulthood, a critical period that constitutes the primary peak of human brain and cognitive development. Here, we adopted resting-state functional near-infrared spectroscopy imaging data to construct hemispheric functional networks and then applied graph theory analysis to quantify the topological characteristics of the hemispheric networks. We found that the adult group exhibited consistent leftward hemispheric asymmetries in both global and local network efficiency, and the degree of leftward asymmetry in local network efficiency was significantly increased with development from childhood to adulthood. At the nodal level, the degree of leftward asymmetry in nodal efficiency, mainly involving the frontal, parietal-occipital junction, and occipital regions, increased with development. These developmental patterns of topological asymmetries suggest that the protracted maturation of functional segregation in the left hemisphere could underlie language development from childhood to adulthood and provide insight into the development of human brain functional networks. © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Data Acquisitionmentioning

confidence: 99%

Functional near-infrared spectroscopy evidence for the development of topological asymmetry between hemispheric brain networks from childhood to adulthood

et al. 2019

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“…We utilized the multichannel fNIRS system ETG-4000 (Hitachi Medical Corporation, Kashiwa, Japan) with two wavelengths of near-infrared light (695 and 830 nm). Optical data based on the modified Beer-Lambert law 43 as previously described was analyzed. 44 Signals reflecting the oxygenated hemoglobin (oxy-Hb), deoxygenated hemoglobin (deoxy-Hb), and total hemoglobin (total-Hb) signal changes were computed in units of millimolar-millimeter (mM-mm).…”

Section: Fnirs Measurementsmentioning

confidence: 99%

Neuropharmacological effect of atomoxetine on attention network in children with attention deficit hyperactivity disorder during oddball paradigms as assessed using functional near-infrared spectroscopy

et al. 2014

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The current study aimed to explore the neural substrate for atomoxetine effects on attentional control in school-aged children with attention deficit hyperactivity disorder (ADHD) using functional near-infrared spectroscopy (fNIRS), which can be applied to young children with ADHD more easily than conventional neuroimaging modalities. Using fNIRS, we monitored the oxy-hemoglobin signal changes of 15 ADHD children (6 to 14 years old) performing an oddball task before and 1.5 h after atomoxetine or placebo administration, in a randomized, double-blind, placebo-controlled, crossover design. Fifteen age-, gender-, and intelligence quotient-matched normal controls without atomoxetine administration were also monitored. In the control subjects, the oddball task recruited the right prefrontal and inferior parietal cortices. The right prefrontal and parietal activation was normalized after atomoxetine administration in ADHD children. This was in contrast to our previous study using a similar protocol showing methylphenidate-induced normalization of only the right prefrontal function. fNIRS allows the detection of differential neuropharmacological profiles of both substances in the attentional network: the neuropharmacological effects of atomoxetine to upregulate the noradrenergic system reflected in the right prefrontal and inferior parietal activations and those of methylphenidate to upregulate the dopamine system reflected in the prefrontal cortex activation.

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“…20 The basis of this approach is the modified Beer-Lambert law. [21][22][23] This method is suitable for repeated measurement of cerebral perfusion at the bedside, because it is simple, noninvasive, requires minimal patient restraint, has high-temporal resolution, and is portable. 24,25 NIRS has been increasingly used in recent years in various clinical fields including neurosurgery, neurology, psychiatry, and rehabilitation.…”

Section: Introductionmentioning

confidence: 99%

Detection of cerebral ischemia using the power spectrum of the pulse wave measured by near-infrared spectroscopy

et al. 2013

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The diagnosis and medical treatment of cerebral ischemia are becoming more important due to the increase in the prevalence of cerebrovascular disease. However, conventional methods of evaluating cerebral perfusion have several drawbacks: they are invasive, require physical restraint, and the equipment is not portable, which makes repeated measurements at the bedside difficult. An alternative method is developed using near-infrared spectroscopy (NIRS). NIRS signals are measured at 44 positions (22 on each side) on the fronto-temporal areas in 20 patients with cerebral ischemia. In order to extract the pulse-wave component, the raw total hemoglobin data recorded from each position are band-pass filtered (0.8 to 2.0 Hz) and subjected to a fast Fourier transform to obtain the power spectrum of the pulse wave. The ischemic region is determined by single-photon emission computed tomography. The pulse-wave power in the ischemic region is compared with that in the symmetrical region on the contralateral side. In 17 cases (85%), the pulse-wave power on the ischemic side is significantly lower than that on the contralateral side, which indicates that the transmission of the pulse wave is attenuated in the region with reduced blood flow. Pulse-wave power might be useful as a noninvasive marker of cerebral ischemia.

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Oxygen Transport to Tissue X

Cited by 17 publications

References 0 publications

Functional near-infrared spectroscopy evidence for the development of topological asymmetry between hemispheric brain networks from childhood to adulthood

Functional near-infrared spectroscopy evidence for the development of topological asymmetry between hemispheric brain networks from childhood to adulthood

Neuropharmacological effect of atomoxetine on attention network in children with attention deficit hyperactivity disorder during oddball paradigms as assessed using functional near-infrared spectroscopy

Detection of cerebral ischemia using the power spectrum of the pulse wave measured by near-infrared spectroscopy

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