The relationship between oxygenation and myoelectric activity in the forearm and shoulder muscles of males and females

Elcadi, Guilherme H.; Forsman, Mikael; Crenshaw, Albert G.

doi:10.1007/s00421-010-1688-z

Cited by 22 publications

(27 citation statements)

References 37 publications

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“…The magnitudes of changes over contraction force are discussed in detail in our previous publication (Elcadi et al 2011). While some studies report interday test-retest reliability for a single contraction (Kell et al 2004;Maikala and Bhambhani 2009), we found one recently published study of particular relevance that examined forearm oxygenation responses during handgrip exercise at various intensities ranging from 20% MVC to maximal adjusted in 10% MVC increments (Celie et al 2011).…”

Section: Isometric Contractions Datamentioning

confidence: 95%

“…Of note, these same landmarks were used in a number of our previous studies (e.g. Elcadi et al 2011) to represent the ECR, however, we cannot be absolutely sure that the ECR exclusively was the muscle that measurements were obtained from at this site. The site on the TD was one-third the distance (in a lateral direction) between C7 and the acromion process of the scapula.…”

Section: Experimental Set Up and Protocolmentioning

confidence: 98%

“…The study was conducted at the Centre for Musculoskeletal Research in Umeå, Sweden. The present study was a part of a larger study on the same subjects that included the relationship between myoelectric activity and oxygenation during submaximal isometric contractions (see Elcadi et al 2011). …”

Section: Subjectsmentioning

confidence: 99%

“…1, a 2-min rest period was implemented between the isometric contractions during which NIRS signals were recorded continuously although only data for 30 s when subjects were sitting at rest in a standardized manner were used for analysis. The 10% MVC contraction was performed last since this contraction also provided data for an additional study (see Elcadi et al 2011). Visual feedback of the force was provided to subjects throughout contractions by a line representing the target force levels on a computer screen in front of the subjects.…”

Section: Isometric Contractionsmentioning

confidence: 99%

“…A computer based literature search of PubMed extending over the last decade generated over 600 hits when combining the terms 'nearinfrared spectroscopy' and 'muscle'. As examples, recent papers include using NIRS experimentally for exercise physiology (Denis et al 2010;Elcadi et al 2011), and clinically as a tool to discriminate between normal and pathological states (Barbosa et al 2011;Cohn et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Reliability of near-infrared spectroscopy for measuring forearm and shoulder oxygenation in healthy males and females

et al. 2011

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This study determined the day-to-day reliability of NIRS-derived oxygenation responses (∆StO(2)%) for isometric contractions and for cuff occlusion. Twenty-four subjects (12 males and 12 females) were tested for 2 days (4-6 days interval). Variables generated were: (1) ∆StO(2)% for isometric contractions (10, 30, 50 and 70% MVC) for descending trapezius (TD) and extensor carpi radialis (ECR) muscles; (2) slope changes in total haemoglobin (HbTslope) and deoxyhaemoglobin (HHbslope) for the ECR using upper arm venous (VO, 50 mmHg) and arterial occlusion (AO, 250 mmHg); (3) recovery slopes (Rslope) for oxygen saturation (StO(2)) following isometric contractions and AO. For each variable, an intraclass correlation (ICC) was calculated to assess the ability to differentiate between subjects, and limits of agreement (LOA) were computed to assess day-to-day consistency of the measurement. ICCs for ΔStO(2)% were lowest at 10% MVC for both ECR (0.58) and TD (0.55), and highest at 30% MVC for ECR (0.95) and at 70% MVC for TD (0.79). For both muscles, LOA for ΔStO(2)% was lowest at 10% and highest at 50 and 70% MVC. ICC for HbTslope was 0.17. For HHbslope ICC was higher for AO (0.83) than for VO (0.73), and LOA was lower for AO. For the ECR Rslope ICCs ranged from 0.88 to 0.90 for contraction, but was lower for AO (0.33); LOA was lowest at 70% MVC. For trapezius Rslope ICCs ranged from 0.63 to 0.73 and LOA was lowest at 30% MVC. For this study, establishing reliability data for the ECR and TD and including variables commonly reported are expected to have meaning for future NIRS studies of work-related upper-extremity pain as well as for other NIRS research and clinical applications.

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Section: Isometric Contractions Datamentioning

confidence: 95%

Section: Experimental Set Up and Protocolmentioning

confidence: 98%

Section: Subjectsmentioning

confidence: 99%

Section: Isometric Contractionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reliability of near-infrared spectroscopy for measuring forearm and shoulder oxygenation in healthy males and females

et al. 2011

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Changes in microcirculation of the trapezius muscle during a prolonged computer task

Cagnie

Dhooge

Akeleyen³

et al. 2012

Eur J Appl Physiol

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The aim of this study is to investigate if there is a change in oxygen saturation and blood flow in the different parts of the trapezius muscle in office workers with and without trapezius myalgia during a standardized computer task. Twenty right-handed office workers participated; ten were recruited based on pain in the trapezius and ten as matching controls. Subjects performed a combination of typing and mousing tasks for 60 min at a standardized workstation. Muscle tissue oxygenation and blood flow data were collected from the upper trapezius (UT), the middle trapezius (MT) and the lower trapezius (LT), both on the left and right side at seven moments (at baseline and every tenth minute during the 1-h typing task) by use of the oxygen to see device. In all three parts of the trapezius muscle, the oxygen saturation and blood flow decreased significantly over time in a similar pattern (p < 0.001). Oxygenation of the left and right UT was significantly higher compared to the other muscle parts (p < 0.001). Oxygen saturation for the MT was significantly lower in the cases compared to the control group (p = 0.027). Blood flow of the UT on the right side was significantly lower than the blood flow on the left side (p = 0.026). The main finding of this study was that 1 h of combined workstation tasks resulted in decreased oxygen saturation and blood flow in all three parts of the trapezius muscle. Future research should focus on the influence of intervention strategies on these parameters.

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Shoulder and forearm oxygenation and myoelectric activity in patients with work-related muscle pain and healthy subjects

et al. 2012

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We tested hypotheses of (a) reduced oxygen usage, oxygen recovery, blood flow and oxygen consumption; and (b) increased muscle activity for patients diagnosed with work-related muscle pain (WRMP) in comparison to healthy controls. Oxygenation was measured with near infrared spectroscopy (NIRS), and muscle activity with EMG for the extensor carpi radialis (ECR) and trapezius descendens (TD) muscles. Eighteen patients with diffuse neck-shoulder-arm pain and 17 controls (matched in age and sex) were equipped with NIRS and EMG probes. After determining an individual's maximum voluntary contraction (MVC) force, short-term (20 s) isometric contractions for the ECR and TD of 10, 30, 50 and 70 % MVC generated ∆StO₂ and StO₂% recovery (Rslope) from NIRS, and RMS%max from EMG signals. In addition, upper arm venous (VO) and arterial (AO) occlusions generated slopes of total hemoglobin (HbTslope) and deoxyhemoglobin (HHbslope) for the resting ECR as surrogates of blood flow and oxygen consumption, respectively. Mixed model analyses, t tests, and Mann-Whitney test were used to assess differences between groups. There was no significant difference in MVC between groups for either muscle. Also, ∆StO₂%, Rslope for either muscle, and ECR-HbTslope were not different between groups, thus our hypotheses of reduced oxygen use, recovery, and blood flow for patients were not confirmed. However, patients had a significantly lower ECR-HHbslope confirming our hypothesis of reduced consumption. Further, there was no difference in RMS%max during contractions meaning that the hypothesis of increased activity for patients was not confirmed. When taking into account the number of NIRS variables studied, differences we found between our patient group and healthy controls (i.e., in forearm oxygen consumption and shoulder oxygen saturation level) may be considered modest. Overall our findings may have been impacted by the fact that our patients and controls were similar in muscle strength, which is in contrast to previous studies.

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The relationship between oxygenation and myoelectric activity in the forearm and shoulder muscles of males and females

Cited by 22 publications

References 37 publications

Reliability of near-infrared spectroscopy for measuring forearm and shoulder oxygenation in healthy males and females

Reliability of near-infrared spectroscopy for measuring forearm and shoulder oxygenation in healthy males and females

Changes in microcirculation of the trapezius muscle during a prolonged computer task

Shoulder and forearm oxygenation and myoelectric activity in patients with work-related muscle pain and healthy subjects

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