Biceps brachii myoelectric and oxygenation changes during static and sinusoidal isometric exercises

Felici, Francesco; Quaresima, Valentina; Fattorini, Luigi; Sbriccoli, Paola; Filligoi, G.; Ferrari, Marco

doi:10.1016/j.jelekin.2007.07.010

Cited by 81 publications

(143 citation statements)

References 33 publications

(52 reference statements)

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“…An example of the typical changes in biceps brachii SmO 2 and tHb (measured by a two-channel oximeter) during a 10 s sustained and 30 repeated isometric exercise of the elbow flexors at maximal voluntary contraction is shown in figure 1. During the sustained contraction (figure 1a), DSmO 2 desaturation slope (DSmO 2slope ) is the negative slope of the least-squared regression line of DSmO 2 during the contraction phase; a higher DSmO 2slope would represent a greater muscle O 2 demand, and consequently a greater energy consumption [8,10]. DSmO 2 minimum amplitude (DSmO 2 min ) is the difference between the minimum SmO 2 value reached during the contraction phase and SmO 2 baseline; lower DSmO 2 min values represent greater O 2 demand relative to O 2 supply [6,10].…”

Section: (B) New Methods and Signal Interpretabilitymentioning

confidence: 99%

“…During the sustained contraction (figure 1a), DSmO 2 desaturation slope (DSmO 2slope ) is the negative slope of the least-squared regression line of DSmO 2 during the contraction phase; a higher DSmO 2slope would represent a greater muscle O 2 demand, and consequently a greater energy consumption [8,10]. DSmO 2 minimum amplitude (DSmO 2 min ) is the difference between the minimum SmO 2 value reached during the contraction phase and SmO 2 baseline; lower DSmO 2 min values represent greater O 2 demand relative to O 2 supply [6,10]. DSmO 2 maximum amplitude (DSmO 2 max ) is the difference between the maximum DSmO 2 value reached during the relaxation phase and SmO 2 baseline; higher DSmO 2max values indicate increased O 2 supply relative to O 2 demand [6].…”

Section: (B) New Methods and Signal Interpretabilitymentioning

confidence: 99%

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The use of near-infrared spectroscopy in understanding skeletal muscle physiology: recent developments

Ferrari

Muthalib

Quaresima

2011

Phil. Trans. R. Soc. A.

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348

347

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This article provides a snapshot of muscle near-infrared spectroscopy (NIRS) at the end of 2010 summarizing the recent literature, offering the present status and perspectives of the NIRS instrumentation and methods, describing the main NIRS studies on skeletal muscle physiology, posing open questions and outlining future directions. So far, different NIRS techniques (e.g. continuous-wave (CW) and spatially, time-and frequency-resolved spectroscopy) have been used for measuring muscle oxygenation during exercise. In the last four years, approximately 160 muscle NIRS articles have been published on different physiological aspects (primarily muscle oxygenation and haemodynamics) of several upper-and lower-limb muscle groups investigated by using mainly two-channel CW and spatially resolved spectroscopy commercial instruments. Unfortunately, in only 15 of these studies were the advantages of using multi-channel instruments exploited. There are still several open questions in the application of NIRS in muscle studies: (i) whether NIRS can be used in subjects with a large fat layer; (ii) the contribution of myoglobin desaturation to the NIRS signal during exercise; (iii) the effect of scattering changes during exercise; and (iv) the effect of changes in skin perfusion, particularly during prolonged exercise. Recommendations for instrumentation advancements and future muscle NIRS studies are provided.

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Section: (B) New Methods and Signal Interpretabilitymentioning

confidence: 99%

Section: (B) New Methods and Signal Interpretabilitymentioning

confidence: 99%

The use of near-infrared spectroscopy in understanding skeletal muscle physiology: recent developments

Ferrari

Muthalib

Quaresima

2011

Phil. Trans. R. Soc. A.

Self Cite

348

347

View full text Add to dashboard Cite

show abstract

“…In the frequency domain, the focus of attention is on the median frequency of the power density function. 40 Frequency domain measurements can be useful in fatigue assessment, as fatigue causes a shift in median frequency.…”

Section: Resultsmentioning

confidence: 99%

“…NIRS re°ects the balance of oxygen delivery to working muscles and oxygen consumption in capillary beds, 10 such measurements are commonly performed, for example, during exercise. 19,20 At present, muscle activity can also be monitored in real time by portable multi-channel wireless NIRS devices. 21 Both sEMG and NIRS have a high time resolution, but a rather limited spatial resolution when measuring noninvasively deep within a tissue.…”

mentioning

confidence: 99%

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

Kauppi

Korhonen

Ferdinando

et al. 2017

J. Innov. Opt. Health Sci.

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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 e®ects 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 e®ect of muscle motion in response of NIRS and EMG when measured noninvasively. Based on our preliminary studies, both NIRS and EMG supply speci¯c 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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“…Greater changes of oxy-and deoxy-Hb were accompanied by a greater decrease slope of the MNF for 1 min of 50% MVC-sustained isometric contraction in a study by Yamada et al [14]. A positive relationship was observed between the tissue oxygenation index change and EMG parameters of the MDF and conduction velocity (CV) (all computed for the time range of the fast phase of NIRS) by Felici et al [15] for 30 s of static and sinusoidal isometric exercises between 20% and 60% MVC.…”

Section: Introductionmentioning

confidence: 89%

Correlation analysis between surface electromyography and continuous-wave near-infrared spectroscopy parameters during isometric exercise to volitional fatigue

Şayli¹,

Akin²,

Cotuk³

2014

Turk J Elec Eng & Comp Sci

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Abstract:In this study, the process of muscular fatigue was examined using surface electromyography (sEMG) and continuous-wave near-infrared spectroscopy (cw-NIRS) simultaneously during an isometric hand grip exercise at 50% and 75% of the maximal voluntary contraction (MVC), sustained until volitional fatigue. The mean frequency of the sEMG decreased during the whole exercise, whereas the root mean square had a tendency to increase. Oxyhemoglobin/deoxyhemoglobin concentration changes computed with cw-NIRS were found to exhibit a fast linear decrease/increase in the first 10-20 s of the exercise, the so-called fast phase, followed by a plateau-like slow phase. The change rates were higher at 75% MVC for both the sEMG and cw-NIRS parameters. Significant correlations were found, especially at 50% MVC, between the sEMG parameters computed for the whole exercise and cw-NIRS parameters computed from the early region of the exercise, i.e. infection duration and amplitude changes to the inflection point. The findings emphasize the potential of cw-NIRS for muscle studies.

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Biceps brachii myoelectric and oxygenation changes during static and sinusoidal isometric exercises

Cited by 81 publications

References 33 publications

The use of near-infrared spectroscopy in understanding skeletal muscle physiology: recent developments

The use of near-infrared spectroscopy in understanding skeletal muscle physiology: recent developments

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

Correlation analysis between surface electromyography and continuous-wave near-infrared spectroscopy parameters during isometric exercise to volitional fatigue

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