Reliability of near-infrared spectroscopy for measuring biceps brachii oxygenation during sustained and repeated isometric contractions

2010 ◽  
Vol 15 (1) ◽  
pp. 017008 ◽  
Author(s):  
Makii Muthalib ◽  
Guillaume Y. Millet ◽  
Valentina Quaresima ◽  
Kazunori Nosaka
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Biceps Brachii ◽  
Isometric Contractions

AN EFFECTIVE TECHNOLOGY TO EVALUATE VIBRATION COMFORTABILITY OF HUMAN BODY BASED ON NEAR-INFRARED SPECTROSCOPY

2016 ◽  
Vol 16 (04) ◽  
pp. 1650051
Author(s):  
XIAOLING LI ◽  
YING JIANG ◽  
JIUHUI WU ◽  
JUN HONG
Keyword(s):  
Infrared Spectroscopy ◽  
Oxygen Saturation ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Biceps Brachii ◽  
Biceps Femoris ◽  
Erector Spinae ◽  
Subjective Feeling ◽  
Effective Technology ◽  
Musculus Biceps Brachii

In the biomedical field, Near-Infrared Spectroscopy (NIRS) is often used to determine the physiological information by the noninvasive detection of the regional tissue oxygen saturation (rSO2). Because the fatigue degree of body could be obviously demonstrated by the oxygen saturation under different vibration conditions, an effective technology to evaluate the vibration comfortability by rSO2 is innovatively proposed in this paper. Without losing generality, the vibration comfortability is analyzed by taking the driving position for example. Different from much more factors in previous approaches, only four main body factors, i.e., brain, musculus biceps brachii, erector spinae and biceps femoris, and three main influence factors on vibration comfortability, i.e., acceleration, frequency, and exposure time, are taken into account in our technology. Under different conditions of the three vibration factors, the rSO2 for the four body factors is detected one by one. Then the relationship among the rSO2, subjective feeling, and the vibration parameters can be obtained by the least square method, and the quantitative evaluation model on vibration comfortability is established. It is found experimentally that the rSO2 trends of musculus biceps brachii, erector spinae and biceps femoris are all greatly increased with the acceleration and frequency, but brain is decreasing obviously. Through our experiment it is verified that this technology can be used in objectively and effectively evaluating under different vibration conditions. This novel technology could provide theoretical support for vibration comfortability assessment and have potential applications in other relative fields.

Tissue Oxygenation by Near-Infrared Spectroscopy and Muscle Blood Flow During Isometric Contractions of the Forearm

1999 ◽  
Vol 24 (3) ◽  
pp. 216-230 ◽  
Author(s):  
Andrew Hicks ◽  
Stuart Mcgill ◽  
Richard L. Hughson
Keyword(s):  
Blood Flow ◽  
Infrared Spectroscopy ◽  
Doppler Ultrasound ◽  
Near Infrared Spectroscopy ◽  
Near Infrared ◽  
Tissue Oxygenation ◽  
Muscle Blood Flow ◽  
Venous Blood ◽  
Muscle Oxygenation ◽  
Isometric Contractions

The relationship between tissue oxygenation measured by near-infrared spectroscopy (NIRS) and forearm muscle blood flow (FBF) measured by Doppler ultrasound was tested during isometric contractions at 10 and 30% maximal voluntary contraction (MVC) under conditions of normoxia and hypoxia (14% inspired O2). Six subjects maintained contractions at 10% MVCfor 5 min and at 30% for 2 min in both gas conditions. FBF was elevated during exercise at 10% MVC in hypoxia compared to normoxia, but there was no further increase in flow at 30% MVC. Median power frequency calculations from electromyographic recordings suggested progressive development of fatigue throughout both 10 and 30% MVC contractions. NIRS indicated no change in muscle oxygenation at 10% MVC, but deep venous blood O2 saturation was reduced in normoxia and more so in hypoxia. At 30% MVC, both NIRS and venous O2 saturation were reduced, with no effect of hypoxia on the NIRS signal. While NIRS might provide an indication of muscle oxygenation during isometric exercise, the conflicting findings for NIRS and direct venous blood sampling at 10 vs. 30% MVC suggest caution in the application of this noninvasive technique. Key words: exercise, Doppler ultrasound, venous blood. O2 saturation, hemoglobin

scholarly journals Combined surface electromyography, near-infrared spectroscopy and acceleration recordings of muscle contraction: The effect of motion

2017 ◽  
Vol 10 (02) ◽  
pp. 1650056 ◽  
Author(s):  
Krista Kauppi ◽  
Vesa Korhonen ◽  
Hany Ferdinando ◽  
Mika Kallio ◽  
Teemu Myllylä
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Surface Electromyography ◽  
Muscle Activation ◽  
Near Infrared ◽  
Biceps Brachii ◽  
Muscle Metabolism ◽  
Specific Information ◽  
Current State ◽  
Activation Data

Noninvasive techniques, surface electromyography (sEMG) in particular, are being increasingly employed for assessing muscle activity. In these studies, local oxygen consumption and muscle metabolism are of great interest. Measurements can be performed noninvasively using optics-based methods such as near-infrared spectroscopy (NIRS). By combining energy consumption data provided by NIRS with muscle level activation data from sEMG, we may gain an insight into the metabolic and functional characteristics of muscle tissue. However, muscle motion may induce artifacts into EMG and NIRS. Thus, the inclusion of simultaneous motion measurements using accelerometers (ACMs) enhances possibilities to perceive the effects of motion on NIRS and EMG signals. This paper reviews the current state of noninvasive EMG and NIRS-based methods used to study muscle function. In addition, we built a combined sEMG/NIRS/ACM sensor to perform simultaneous measurements for static and dynamic exercises of a biceps brachii muscle. Further, we discuss the effect of muscle motion in response of NIRS and EMG when measured noninvasively. Based on our preliminary studies, both NIRS and EMG supply specific information on muscle activation, but their signal responses also showed similarities with acceleration signals which, in this case, were supposed to be solely sensitive to motions.

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