BACKGROUND AND PURPOSE Motor functional recovery from stroke can occur, but the mechanisms underlying this restorative process remain to be elucidated. We used near-infrared spectroscopic (NIRS) topography in comparison with functional MRI (fMRI) to evaluate the compensatory motor activation of cortical regions in patients who recovered from hemiparesis after cortical cerebral infarction. MET...

Influence of Changes in Blood Pressure on Cerebral Oxygenation: Role of Skin Blood Flow? To the Editor: We read with interest the report from Lucas et al1 in the recent issue of Hypertension. We agree with the findings presented on cerebral blood flow with transcranial ultrasound Doppler, but we propose an alternative interpretation of the cerebral oxygenation data. As pointed out by the author...

Analyses of the nitrite reductase gene diversities (nirK and nirS) in an activated sludge community fed with both nitrite and glucose were conducted. Results suggest that the topology of nirK and nirS gene fragment-based phylogenetic trees is influenced more by the available electron acceptor than by the carbon source. A denitrification reactor was operated for 53 days and a clone library const...

The ability to sustain submaximal exercise is largely dependent on the oxidative capacity of mitochondria within skeletal muscle, and impairments in oxidative metabolism have been implicated in many neurologic and cardiovascular pathologies. Here we review studies which have demonstrated the utility of Near-infrared spectroscopy (NIRS) as a method of evaluating of skeletal muscle mitochondrial ...

Brain activities are analyzed for the button selection task using Neuro-NIRS, which is analysis method of quick component of NIRS. Quick component of NIRS is numerically quantifies by short time average of absolute value. The average is represented by, maximum and density. Since button selection task is short time event, it seems the instantaneous activities, like maximum is playing major roles...

The rupture of an unstable atherosclerotic plaque precedes the majority of acute coronary syndromes, and considerable effort has been devoted to identifying patients at increased risk of future coronary ischaemic events. Atherosclerosis imaging is a potentially attractive strategy to detect vulnerable coronary plaques, with each modality having its own advantages and limitations. Different char...

9.2. NIRS AND IMAGING: THEORY AND INSTRUMENTATION ................................................... 434 9.2.1. General introduction ............................................................................................................... 434 9.2.2. Characteristics of NIRS .......................................................................................................... 435 9.2.3...

In the present study we have developed a new version (ND-NIRs) of a polychromator-type near-infrared (NIR) spectrometer with a high-resolution photo diode array detector, which we built before (D-NIRs). The new version has four 5 W halogen lamps compared with the three lamps for the older version. The new version also has a condenser lens with a shorter focal point length. The increase in the n...

The correlation of NIRS (near-infrared spectroscopy) and EEG (electro-cortical activity) in exercise studies has never been shown. Eight sport students performed an incremental bicycle exercise test under normoxic and hypoxic (12.7% O2) conditions respectively. EEG and NIRS recordings of the prefrontal cortex (PFC, Brodmann area 10. 46) were performed synchronously to shed light on their correl...

Near infrared spectroscopy (NIRS) is a novel technique that employs diffuse light to non-invasively monitor tissue haemodynamics and oxidative metabolism. NIRS employs optical radiation in the range 600-1000 nm where light attenuation by tissue constituents (water, lipid, oxyhaemoglobin and deoxy-haemoglobin) is relatively low and accounts for penetration through several centimetres of tissue. ...