Publications using the OxyMon
Differential Brain and Muscle Tissue Oxygenation Responses to Exercise in Tibetans Compared to Han Chinese
The Tibetans’ better aerobic exercise capacity at altitude remains ill-understood. We tested the hypothesis that Tibetans display better muscle and brain tissue oxygenation during exercise in hypoxia. Using near-infrared spectrometry (NIRS) to …
A deep convolutional neural network for estimating hemodynamic response function with reduction of motion artifacts in fNIRS
Abstract Objective: Functional near-infrared spectroscopy (fNIRS) is a neuroimaging technique for monitoring hemoglobin concentration changes in a non-invasive manner. However, subject movements are often significant sources of artifacts. While …
Increase in Low-Frequency Oscillations in fNIRS as Cerebral Response to Auditory Stimulation with Familiar Music
Recognition of typical patterns of brain response to external stimuli using near-infrared spectroscopy (fNIRS) may become a gateway to detecting covert consciousness in clinically unresponsive patients. This is the first fNIRS study on the cortical …
Acute effects of exercise on cerebrovascular response and cognitive performance in individuals with stable coronary heart disease
Background Individuals with coronary heart disease (CHD) exhibit cognitive deficits and cerebrovascular dysfunctions, and are at higher risk of developing dementia. Cognitive function in individuals with CHD has never been studied during acute …
International Journal of Image, Graphics and Signal Processing(IJIGSP)
Consumers undergo an intellectual burden when working with technological programs. Mostly in situations of several activities. For instance, while communicating when driving with the navigation device. It is not necessary to divert users from their …
Blood volume vs. deoxygenated NIRS signal: computational analysis of the effects muscle O 2 delivery and blood volume on the NIRS signals
Near-infrared spectroscopy (NIRS) signals quantify the oxygenated ($Δ$HbMbO 2 ) and deoxygenated ($Δ$HHbMb) heme group concentrations. $Δ$HHbMb has been preferred to $Δ$HbMbO 2 in evaluating skeletal muscle oxygen extraction because it is assumed to …
Effects of graded hypoxia during exhaustive intermittent cycling on subsequent exercise performance and neuromuscular responses
This study examined the effect of graded hypoxia during exhaustive intermittent cycling on subsequent exercise performance and neuromuscular fatigue characteristics in normoxia. Fifteen well-trained cyclists performed an exhaustive intermittent …
Supplemental Watermelon Juice Attenuates Acute Hyperglycemia-Induced Macro-and Microvascular Dysfunction in Healthy Adults
Background Acute hyperglycemia reduces NO bioavailability and causes macro- and microvascular dysfunction. Watermelon juice (WMJ) is a natural source of the amino acid citrulline, which is metabolized to form arginine for the NO cycle and may improve …
The Role of Deconditioning in the End-Stage Renal Disease Myopathy: Physical Exercise Improves Altered Resting Muscle Oxygen Consumption
Background: Skeletal muscle dysfunction and poor exercise tolerance are hallmarks of end-stage renal disease (ESRD). Noninvasively measured (near-infrared spectroscopy, NIRS) resting muscle oxygen consumption (rmVO2) is a biomarker of muscle …
A randomized placebo-control trial of the acute effects of oxygen supplementation on exercise hemodynamics, autonomic modulation, and brain oxygenation in patients with pulmonary hypertension
Background: The integrative physiological effects of O2 treatment on patients with pulmonary hypertension (PH) during exercise, have not been fully investigated. We simultaneously evaluated, for the first time, the effect of oxygen supplementation on …
A randomized sham-controlled trial on the effect of continuous positive airway pressure treatment on gait control in severe obstructive sleep apnea patients
To determine the effect of continuous positive airway pressure (CPAP), the gold standard treatment for obstructive sleep apnea syndrome (OSAS), on gait control in severe OSAS patients. We conducted a randomized, double-blind, parallel-group, …
Diminished prefrontal cortex activation in patients with binge eating disorder associates with trait impulsivity and improves after impulsivity-focused treatment based on a randomized controlled IMPULS trial
Background Behavioral and cognitive control are vital for healthy eating behavior. Patients with binge eating disorder (BED) suffer under recurrent binge eating episodes accompanied by subjective loss of control that results, among other factors, …
Muscle mitochondrial capacity in high‐ and low‐fitness females using near‐infrared spectroscopy
The recovery of muscle oxygen consumption (m (Formula presented.) O2) after exercise measured using near-infrared spectroscopy (NIRS) provides a measure of skeletal muscle mitochondrial capacity. Nevertheless, due to sex differences in factors that …
Exertional Desaturation in Idiopathic Pulmonary Fibrosis: The Role of Oxygen Supplementation in Modifying Cerebral-Skeletal Muscle Oxygenation and Systemic Hemodynamics
Background: In patients with idiopathic pulmonary fibrosis (IPF) with isolated exertional desaturation, there are limited data regarding the effectiveness of oxygen supplementation during exercise training; the underlying mechanisms that contribute …
fNIRS signal quality estimation by means of a machine learning algorithm trained on morphological and temporal features
Functional near infrared spectroscopy (fNIRS) is used for brain hemodynamic assessment. Cortical hemodynamics are reliably estimated when the recorded signal has a sufficient quality. This is acquired when fNIRS optodes have proper scalp coupling. A …
Multiple-day high-dose beetroot juice supplementation does not improve pulmonary or muscle deoxygenation kinetics of well-trained cyclists in normoxia and hypoxia
Dietary nitrate (NO3 -) supplementation via beetroot juice (BR) has been reported to lower oxygen cost (i.e., increased exercise efficiency) and speed up oxygen uptake (VO2) kinetics in untrained and moderately trained individuals, particularly …
Reduced post‐exercise muscle microvascular perfusion with compression is offset by increased muscle oxygen extraction: Assessment by contrast‐enhanced ultrasound
The microvasculature is important for both health and exercise tolerance in a range of populations. However, methodological limitations have meant changes in micro- vascular blood flow are rarely assessed in humans during interventions designed to …
A systematic Review of Studies that Used NIRS to Measure Neural Activation During Emotion Processing in Healthy Individuals
Functional neuroimaging provides an avenue for earlier diagnosis and tailored treatment of psychological disorders characterized by emotional impairment. Near-infrared spectroscopy offers ecological advantages compared to other neuroimaging …
A Functional Near-Infrared Spectroscopy Examination of the Neural Correlates of Cognitive Shifting in Dimensional Change Card Sort Task
This study aims to examine the neural correlates of cognitive shifting during the Dimensional Change Card Sort Task (DCCS) task with functional near-infrared spectroscopy. Altogether 49 children completed the DCCS tasks, and 25 children (Mage = …
Circulating biomarkers of nitric oxide bioactivity and impaired muscle vasoreactivity to exercise in adults with uncomplicated type 1 diabetes
Aims/hypothesis: Early compromised endothelial function challenges the ability of individuals with type 1 diabetes to perform normal physical exercise. The exact mechanisms underlying this vascular limitation remain unknown, but may involve either …