Publications using the OxyMon
Knee extensor fatigue threshold is related to whole-body V̇O 2max
Purpose: Above a given exercise intensity, rapid muscle fatigue will occur. We explored the possibility of assessing torque threshold for peripheral fatigue during single-legged repetitive isometric knee extensor exercise. We hypothesized this …
Multi-channel NIRS of the primary motor cortex to discriminate hand from foot activity
The poor spatial resolution of near-infrared spectroscopy (NIRS) makes it difficult to distinguish two closely located cortical areas from each other. Here, a combination of multi-channel NIRS and a centre of gravity (CoG) approach (widely accepted …
Reproducibility of near-infrared spectroscopy parameters measured during brachial artery occlusion and reactive hyperemia in healthy men
Near-infrared spectroscopy (NIRS) is a noninvasive technique evaluating microvascular function. The aim of this study was to assess the reproducibility of NIRS parameters during reactive hyperemia induced by a 5 min brachial artery occlusion. …
Time course of the haemodynamic response to visual stimulation in migraine, measured using near-infrared spectroscopy
Background: In patients with migraine, an abnormally large haemodynamic response to epileptogenic visual stimulation has previously been observed, consistent with the hypothesis of a cortical hyperexcitability. Ophthalmic filters have been used in …
A brief review on the use of functional near-infrared spectroscopy (fNIRS) for language imaging studies in human newborns and adults
Upon stimulation, real time maps of cortical hemodynamic responses can be obtained by non-invasive functional near-infrared spectroscopy (fNIRS) which measures changes in oxygenated and deoxygenated hemoglobin after positioning multiple sources and …
Near-infrared spectroscopy assessment following exercise training in patients with intermittent claudication and in untrained healthy participants
Selected near-infrared spectroscopy (NIRS) parameters were assessed in healthy untrained participants and in peripheral arterial disease (PAD) trained patients to evaluate their usefulness in rehabilitative outcome. Forty-five PAD and 15 healthy …
Lipschitz-Killing curvature based expected Euler characteristics for p-value correction in fNIRS
Functional near-infrared spectroscopy (fNIRS) is a non-invasive imaging approach for measuring brain activities based on changes in the cerebral concentrations of hemoglobin. Recently, statistical analysis based on a general linear model (GLM) has …
Review: The evolution of wireless near infrared spectroscopy applications in urology and rationale for clinical use
Near infrared (NIR) spectroscopy is an established non-invasive optical technique for measuring changes in haemoglobin concentration occurring in the microcirculation in real time. NIR spectroscopy parameters refect change in tissue haemodynamics and …
Alveolar gas exchange and tissue oxygenation during incremental treadmill exercise, and their associations with blood O 2 carrying capacity
The magnitude and timing of oxygenation responses in highly active leg muscle, less active arm muscle, and cerebral tissue, have not been studied with simultaneous alveolar gas exchange measurement during incremental treadmill exercise. Nor is it …
Bladder anatomy physiology and pathophysiology: Elements that suit near infrared spectroscopic evaluation of voiding dysfunction
Bladder studies are the most recent biomedical application of NIRS in urology. Transcutaneous monitoring of the detrusor muscle in the bladder wall as the organ fills and empties offers new parameters for evaluation of normal and dysfunctional …
Carbon monoxide exposure during exercise performance: Muscle and cerebral oxygenation
Aim: To investigate the effect of carbon monoxide (CO) in the inspired air as anticipated during peak hours of traffic in polluted megalopolises on cerebral, respiratory and leg muscle oxygenation during a constant-power test (CPT). In addition, …
DHA-rich oil modulates the cerebral haemodynamic response to cognitive tasks in healthy young adults: a near IR spectroscopy pilot study.
The impact of dietary n-3 PUFA on behavioural outcomes has been widely researched; however, very little attention has been given to their impact on brain functioning in physiological terms. A total of twenty-two healthy adults took part in this …
Docosahexaenoic acid-rich fish oil modulates the cerebral hemodynamic response to cognitive tasks in healthy young adults
A number of recent studies have assessed the impact of dietary omega-3 polyunsaturated fatty acids (n-3 PUFAs) on behavioral outcomes; however, very little attention has been given to their impact upon brain function in physiological terms. …
Muscle Oxidative Capacity: an Indicator of Functional Status in People With Multiple Sclerosis
PURPOSE: Evaluation of skeletal muscle oxidative capacity in people with multiple sclerosis (MS) using near-infrared spectroscopy (NIRS) and its relationship with measures of walking disability. METHODS: Muscle oxidative capacity was measured in an …
Noninvasive evaluation of skeletal muscle mitochondrial capacity with near-infrared spectroscopy: Correcting for blood volume changes
Near-infrared spectroscopy (NIRS) is a well-known method used to measure muscle oxygenation and hemodynamics in vivo. The application of arterial occlusions allows for the assessment of muscle oxygen consumption (mVO 2) using NIRS. The aim of this …
Orthostatic leg blood volume changes assessed by near-infrared spectroscopy
Standing up shifts blood to dependent parts of the body, and blood vessels in the leg become filled. The orthostatic blood volume accumulation in the small vessels is relatively unknown, although these may contribute significantly. We hypothesized …
Oscillations in cerebral blood flow and cortical oxygenation in Alzheimer's disease
In Alzheimer's disease (AD) cerebrovascular function is at risk. Transcranial Doppler, near-infrared spectroscopy, and photoplethysmography are noninvasive methods to continuously measure changes in cerebral blood flow velocity (CBFV), cerebral …
Repetitive strain injury: a novel focus on an ancient problem
Proefschrift Radboud Universiteit Nijmegen.
Short intermittent hypoxic exposures augment ventilation but do not alter regional cerebral and muscle oxygenation during hypoxic exercise
This study investigated the effects of four exposures to normobaric hypoxia (SIH group; FIO2=0.120, N= 10) or placebo-control normoxia (Control group; FI O2=0.209, N= 9) on cardio-respiratory responses to hypoxic exercise. Before and after the …
VO 2 on-kinetics in isolated canine muscle in situ during slowed convective O 2 delivery
The purpose of this study was to examine O 2 uptake (VO 2) on-kinetics when the spontaneous blood flow (and therefore O 2 delivery) onresponse was slowed by 25 and 50 s. The isolated gastrocnemius muscle complex (GS) in situ was studied in six …