Spatial distribution of lumbar erector spinae muscle activity in individuals with and without chronic low back pain during a dynamic isokinetic fatiguing task

Arvanitidis, Michail; Bikinis, Nikolaos; Petrakis, Stelios; Gkioka, Afroditi; Tsimpolis, Dimitrios; Falla, Deborah; Martinez‐Valdes, Eduardo

doi:10.1016/j.clinbiomech.2020.105214

Cited by 17 publications

(21 citation statements)

References 47 publications

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“…Trunk extensor isometric muscle strength did not differ between groups, which is consistent with the results of some previous studies 14 , 23 , 66 . Previous research has shown that pain decreases the ability to exert maximal forces 67 , 68 , due to nociceptive-induced inhibition to agonist muscles 69 .…”

Section: Discussionsupporting

confidence: 92%

“…Then, the HDsEMG grid was placed unilaterally over the lumbar ES, 2 cm lateral to the L5 spinous process (AS controls: right side, CLBP group: most painful side) (Fig. 1 ) 23 , 24 , 26 , 36 . The electrode was placed on the most painful side for the CLBP group as it was expected that this side would show greater changes in myoelectric activity 25 .…”

Section: Methodsmentioning

confidence: 99%

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People with chronic low back pain display spatial alterations in high-density surface EMG-torque oscillations

Arvanitidis

Jiménez-Grande

Haouidji-Javaux

et al. 2022

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We quantified the relationship between spatial oscillations in surface electromyographic (sEMG) activity and trunk-extension torque in individuals with and without chronic low back pain (CLBP), during two submaximal isometric lumbar extension tasks at 20% and 50% of their maximal voluntary torque. High-density sEMG (HDsEMG) signals were recorded from the lumbar erector spinae (ES) with a 64-electrode grid, and torque signals were recorded with an isokinetic dynamometer. Coherence and cross-correlation analyses were applied between the filtered interference HDsEMG and torque signals for each submaximal contraction. Principal component analysis was used to reduce dimensionality of HDsEMG data and improve the HDsEMG-based torque estimation. sEMG-torque coherence was quantified in the δ(0–5 Hz) frequency bandwidth. Regional differences in sEMG-torque coherence were also evaluated by creating topographical coherence maps. sEMG-torque coherence in the δ band and sEMG-torque cross-correlation increased with the increase in torque in the controls but not in the CLBP group (p = 0.018, p = 0.030 respectively). As torque increased, the CLBP group increased sEMG-torque coherence in more cranial ES regions, while the opposite was observed for the controls (p = 0.043). Individuals with CLBP show reductions in sEMG-torque relationships possibly due to the use of compensatory strategies and regional adjustments of ES-sEMG oscillatory activity.

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Section: Discussionsupporting

confidence: 92%

Section: Methodsmentioning

confidence: 99%

People with chronic low back pain display spatial alterations in high-density surface EMG-torque oscillations

Arvanitidis

Jiménez-Grande

Haouidji-Javaux

et al. 2022

Sci Rep

Self Cite

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“…Interestingly, we did not observe changes in the coefficient of variation and the barycenter coordinates of the RMS values across the EMG matrices, highlighting no modifications in the spatial activation strategies of the calf muscles performing the dynamic balance task after fatigue. In line with our work, previous studies have found minimal variations of the RMS of the barycenter during isometric or dynamic fatigue tasks in healthy individuals (Falla and Farina, 2007;Arvanitidis et al, 2021). This finding certainly deserves further investigation.…”

Section: Discussionsupporting

confidence: 92%

Neuromuscular Fatigue Affects Calf Muscle Activation Strategies, but Not Dynamic Postural Balance Control in Healthy Young Adults

et al. 2022

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Neuromuscular fatigue could negatively affect postural balance, but its effects on dynamic postural regulation are still debated. This study aimed to investigate whether a fatigue protocol on calf muscle could affect muscle activation strategies and dynamic balance performance. Seventeen male adults (age 24.1 ± 4.6 years; height 183.9 ± 7.2 cm; weight 80.2 ± 7.2 kg) volunteered in the study. They performed a dynamic test on an instrumented platform, which provided anterior-posterior oscillations on the sagittal plane, before and after a localized fatigue protocol. High-density surface electromyographical (EMG) signals were recorded bilaterally from the soleus and the medial gastrocnemius muscles. The fatigue protocol, consisting of two quasi-isometric tiptoe standing exercise to failure with a fixed load, did not affect the global dynamic balance performance. Conversely, the frequency value corresponding to 95% of the total power spectrum density of the angular displacement signal increased after fatigue (from 1.03 ± 0.42 to 1.31 ± 0.42 Hz; p < 0.05). The EMG analysis showed a significant difference in the PRE/POST fatigue ratio of the root-mean-square (RMS) between the soleus and the gastrocnemius medialis muscles. No differences were detected for the coefficient of variation and the barycenter coordinates of the RMS EMG values between muscles and sides. The variations in the frequency content of the angular displacement and EMG activity across muscles may be related to an increase in the calf muscles stiffness after fatigue. The role of neuromechanical calf muscle properties seems to be relevant in maintaining the dynamic postural performance after a quasi-isometric fatigue protocol until failure.

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“…The existing evaluation methods in clinical practice involves surface electromyogram (sEMG) and functional imaging. The parameters in frequency and time domain of sEMG signal can reflect the lumbar muscle function ( Villafane et al, 2016 ; Rose-Dulcina et al, 2020 ; Arvanitidis et al, 2021 ), but the sEMG characteristics of the lumbar muscle associated with LBP have not been systematically clarified ( Wang et al, 2019 ). Although functional imaging such as X-ray, CT and MRI can accurately diagnose the obvious changes in muscle structure and state, these imaging modalities might be not suitable as the daily detection tool in primary medical units to evaluate LBF for consideration of radiation and cost of equipment ( Ching et al, 2013 ).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Low Back Pain in Helicopter Pilots Using Electrical Bio-Impedance Technique: A Feasibility Study

et al. 2022

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Low back pain (LBP) is known to pose a serious threat to helicopter pilots. This study aimed to explore the potential of electrical bio-impedance (EBI) technique with the advantages of no radiation, non-invasiveness and low cost, which is intended to be used as a daily detection tool to assess LBP in primary aviation medical units. The LBP scales (severity) in 72 helicopter pilots were assessed using a pain questionnaire, while the bilateral impedance measurements of the lumbar muscle were carried out with a high precision EBI measurement system. Results showed that the modulus of lumbar muscle impedance increased with LBP scale whereas the phase angle decreased. For different LBP scales, significant differences were found in the modulus of lumbar muscle impedance sum on both sides (Zsum), as well as in the modulus and phase angle of lumbar muscle impedance difference between both sides (Zdiff and ϕdiff), respectively (P < 0.05). Moreover, Spearman’s correlation analysis manifested a strong correlation between Zsum and LBP scale (R = 0.692, P < 0.01), an excellent correlation between Zdiff and LBP scale (R = 0.86, P < 0.01), and a desirable correlation between ϕdiff and LBP scale (R = −0.858, P < 0.01). In addition, receiver operator characteristic analysis showed that for LBP prediction, the area under receiver operator characteristic curve of Zsum, Zdiff, and ϕdiff were 0.931, 0.992, and 0.965, respectively. These findings demonstrated that EBI could sensitively and accurately detect the state of lumbar muscle associated with LBP, which might be the potential tool for daily detection of LBP in primary aviation medical units.

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Spatial distribution of lumbar erector spinae muscle activity in individuals with and without chronic low back pain during a dynamic isokinetic fatiguing task

Cited by 17 publications

References 47 publications

People with chronic low back pain display spatial alterations in high-density surface EMG-torque oscillations

People with chronic low back pain display spatial alterations in high-density surface EMG-torque oscillations

Neuromuscular Fatigue Affects Calf Muscle Activation Strategies, but Not Dynamic Postural Balance Control in Healthy Young Adults

Assessment of Low Back Pain in Helicopter Pilots Using Electrical Bio-Impedance Technique: A Feasibility Study

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