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- W2130603606 endingPage "487" @default.
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- W2130603606 abstract "In the last decade the study of the human brain and muscle energetics underwent a radical change, thanks to the progressive introduction of noninvasive techniques, including near-infrared (NIR) spectroscopy (NIRS). This review summarizes the most recent literature about the principles, techniques, advantages, limitations, and applications of NIRS in exercise physiology and neuroscience. The main NIRS instrumentations and measurable parameters will be reported. NIR light (700-1000 nm) penetrates superficial layers (skin, subcutaneous fat, skull, etc.) and is either absorbed by chromophores (oxy- and deoxyhemoglobin and myoglobin) or scattered within the tissue. NIRS is a noninvasive and relatively low-cost optical technique that is becoming a widely used instrument for measuring tissue O 2 saturation, changes in hemoglobin volume and, indirectly, brain/muscle blood flow and muscle O 2 consumption. Tissue O 2 saturation represents a dynamic balance between O 2 supply and O 2 consumption in the small vessels such as the capillary, arteriolar, and venular bed. The possibility of measuring the cortical activation in response to different stimuli, and the changes in the cortical cytochrome oxidase redox state upon O 2 delivery changes, will also be mentioned. Key words: tissue oximetry, oxidative metabolism, optical imaging, blood flow, oxygen consumption, exercise physiology" @default.
- W2130603606 created "2016-06-24" @default.
- W2130603606 creator A5020159141 @default.
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- W2130603606 date "2004-08-01" @default.
- W2130603606 modified "2023-10-11" @default.
- W2130603606 title "Principles, Techniques, and Limitations of Near Infrared Spectroscopy" @default.
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