Effect of Task Failure on Intermuscular Coherence Measures in Synergistic Muscles

Castronovo, Anna Margherita; Marchis, Cristiano De; Schmid, Maurizio; Conforto, Silvia; Severini, Giacomo

doi:10.1155/2018/4759232

Cited by 11 publications

(9 citation statements)

References 65 publications

(83 reference statements)

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“…Here, most pronounced IMC was again evident in ES followed by TA, VM, and VL, as both ES and TA showed increases in IMC compared with VM and VL. Our findings add to previous evidence of beta IMC for ES ( Danna-Dos-Santos et al 2014 ), TA ( Boonstra et al 2008 , 2009 , 2015 ; Bravo-Esteban et al 2014 ), VM ( Boonstra et al 2008 ; von Tscharner et al 2018 ; Walker et al 2019 ), and VL ( von Tscharner et al 2018 ; Walker et al 2019 ), but were expected, as beta IMC has been commonly observed between synergistically activated muscles ( Boonstra 2013 ; Boonstra and Breakspear 2012 ; Castronovo et al 2018 ; Degani et al 2017 ; Kilner et al 1999 ). Beta IMC of the lower extremities has been described between homologous VM during bilateral leg extensions ( Boonstra et al 2008 ), as well as homologous VM and TA during standing ( Boonstra et al 2015 ), although not for homologous ES.…”

Section: Discussionsupporting

confidence: 88%

“…Apart from ES, gamma IMC has been observed in all other muscles recorded during this study, i.e., VM, VL ( Mohr et al 2015 , 2018 ; von Tscharner et al 2018 ), and TA ( Bravo-Esteban et al 2014 ; van Asseldonk et al 2014 ). Numerous studies have observed gamma IMC between muscle pairs of lower extremities ( Bravo-Esteban et al 2014 ; Castronovo et al 2018 ; De Marchis et al 2015 ; Mohr et al 2015 , 2018 ; van Asseldonk et al 2014 ; Walker et al 2019 ), although, to the best of our knowledge, this is the first study to demonstrate gamma IMC between homologous muscles of lower extremities. With these results, we extend findings by Mohr and colleagues ( Mohr et al 2015 , 2018 ), who originally observed gamma IMC between VM and VL during isometric as well as dynamic BpS.…”

Section: Discussionmentioning

confidence: 68%

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Intermuscular coherence between homologous muscles during dynamic and static movement periods of bipedal squatting

Kenville

Maudrich

Vidaurre

et al. 2020

Journal of Neurophysiology

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Coordination of functionally coupled muscles is a key aspect of movement execution. Demands on coordinative control increase with the number of involved muscles and joints, as well as with differing movement periods within a given motor sequence. While previous research has provided evidence concerning inter- and intramuscular synchrony in isolated movements, compound movements remain largely unexplored. With this study, we aimed to uncover intermuscular synchrony between homologous muscles during bipedal squatting (BpS) at multiple frequency bands (alpha, beta, and gamma) utilizing intermuscular coherence (IMC) analyses. For this purpose, participants performed bipedal squats without additional load, which were divided into three distinct movement periods. Surface electromyography (EMG) was recorded from 4 homologous muscle pairs representing prime movers during bipedal squatting. We found significant IMC at all frequency bands for all homologous muscles. Importantly, we provide novel evidence that IMC magnitudes differ between movement periods in beta and gamma bands, as well as between homologous muscle pairs across all frequency bands. Here, beta and gamma IMC magnitudes were highest during eccentric movement periods, whereas we did not find movement related modulations for alpha IMC magnitudes. This finding thus indicates increased integration of afferent integration during eccentric movement periods. Collectively, our results shed light on intermuscular synchronization during bipedal squatting, as we provide evidence that central nervous processing of intermuscular functioning is achieved through task-dependent modulations of common neural input to homologous muscles.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 68%

Intermuscular coherence between homologous muscles during dynamic and static movement periods of bipedal squatting

Kenville

Maudrich

Vidaurre

et al. 2020

Journal of Neurophysiology

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“…The studies propose that the degree of correlation that is recorded between the different muscle activities can advertise the co-activation of functional, and it may be extended to functionally similar and anatomically close muscles (13,36) or functionally different and anatomically distant (37). The pair-wise coherence can also be modeled as two terms summation: The one just related to the muscles pair considered (residual) with excluding the third one effects and the one relative to the whole synergy (pair-wise) but with elements synchronized to the third muscle involved activity (31). According to this claim, the pair-wise coherence decline could be explained either by the contribution of coherence decreasing relative to the drive of synergistic (all three muscles common command) or by volley desynchronization that is solely common to the two muscles (31).…”

Section: Discussionmentioning

confidence: 99%

“…The pair-wise coherence can also be modeled as two terms summation: The one just related to the muscles pair considered (residual) with excluding the third one effects and the one relative to the whole synergy (pair-wise) but with elements synchronized to the third muscle involved activity (31). According to this claim, the pair-wise coherence decline could be explained either by the contribution of coherence decreasing relative to the drive of synergistic (all three muscles common command) or by volley desynchronization that is solely common to the two muscles (31).…”

Section: Discussionmentioning

confidence: 99%

The Changes of Motor Control Strategies in Non-specific Chronic Low Back Pain During Spinal Manipulation and Muscle Energy Techniques: A Beta-band Intermuscular Pair-Wise Coherence Analysis

et al. 2021

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Background: Until now, a variety of techniques have been introduced to address the adverse effects of NS-CLBP, including spinal manipulation technique (SMT) and muscle energy technique (MET). However, most of these techniques have focused on pain assessment and disability. In other words, the intermuscular synchronization between the co-contracting muscles was not considered, and hence, the effectiveness of these techniques on the corticospinal tract function was not studied. Objectives: This study aimed to compare the effects of SMT and MET on corticospinal tract function during four phases of standing, flexion, relaxation, and extension in flexion-extension task (F-ET) in NS-CLBP using pair-wise coherence of Beta-band intermuscular coherence (Bb-IMC). Methods: Twenty volunteer healthy male subjects and twenty-four male subjects with NS-CLBP (20 - 45 years of age) participated in this work. The patients had continuous or recurrent symptoms for three months or more without any referral pain to the lower extremities. The patients were randomly assigned to two equal intervention groups (SMT and MET), and the techniques were applied as described by Greenman. Surface electromyography (sEMGs) from lumbopelvic muscles was recorded for all participants (i.e., healthy group and the patient groups), while they performed three trials of F-ET, and the pair-wise coherence for all muscles was calculated using Bb-IMC analysis. Besides, in the patient's groups, sEMGs from the muscles were recorded before and after the interventional techniques (i.e., SMT and MET), while they performed three trials of F-ET, and the pair-wise coherence was calculated. Multivariate analysis of variance test was used to compare the healthy subjects and patient groups before the interventions in A and B muscle cross at different phases of F-ET task. Furthermore, in the NS-CLBP patients, comparisons were made before and after the interventions in each group (i.e., SMT and MET groups) as well as between the two groups in A and B muscle cross at different phases of the F-ET task. Results: In the standing phase of F-ET, there were no significant differences in the SMT and MET group before and after the intervention in PWC of A muscle cross and B muscle cross (P < 0.05). Considering the flexion phase, there were significant differences in the SMT group in all pair muscles as PWC (M1-M4), PWE (M1-M6), PWC (M4-M6) (P < 0.05), whereas there was one significantly in PWC (M4-M6) in the MET group (P < 0.05). In the relaxation phase, the SMT had significantly in PWC (M2-M5), whereas there was one significantly in PWC (M4-M6) in MET group (P < 0.05). In the extension phase, although the SMT was not significant (P < 0.05) in the MET intervention group, there were significant differences in the PWC (M2-M3) and PWC muscles (M2-M5). Conclusions: This study provided some pieces of evidence about the effects of one of the common manual therapy techniques on the primary motor cortex and corticospinal drive in the NS-CLBP patients. The results showed that, by increasing the pair-wise coherence in all phases of FE-T, SMT intervention was more effective than MET intervention. Therefore, the pair-wise coherence of Bb-IMC can be considered an approach for clinicians when designing the rehabilitation protocol to ensure optimal treatment.

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“…Three muscles were estimated using the pool coherence function to find out the common neural coupling between each of two muscle groups (i.e., group A and group B) (35), which is defined as:…”

Section: Beta-band Intermuscular Coherence Analysismentioning

confidence: 99%

Comparison of the Beta-Band Intermuscular Pool Coherence Between Chronic Non-specific Low Back Pain and Healthy Subjects

et al. 2021

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Objectives: The current study aimed to compare between the chronic non-specific low back pain (CNSLBP) and healthy subjects during four phases of the trunk flexion-extension task (standing, flexion, relaxation, and extension phases) by using pool coherence as well as pairwise coherence of Beta band Intermuscular coherence (Bb-IMC) and flexion relaxation phenomena. Methods: Twenty-four men with CNSLBP and 20 healthy men voluntarily participated in this study. All subjects performed three tests of Flexion-extension task (F-ET) while the surface electromyography (sEMGs) were recorded from the right erector spinal muscle of the lumbar region “1”, left erector spinal muscle of the lumbar region “2”, right gluteus maximus muscle”3”, left gluteus maximus muscle”4”, right hamstring muscle”5” and left hamstring muscle”6”. Accordingly, group A contains muscles 1, 4, and 6 and group B consists of muscles 2, 3, and 5. The pool coherence (PC) and the pairwise coherence (PWC) for all the above-mentioned muscles were calculated using Beta-band intermuscular coherence analysis. Thereafter, the mean pool coherence (mPC) was considered for group A and group B for four phases of F-ET in three groups as following: CNSLBP patients group, healthy subjects group and the third group included all subjects that participated in this study, whether patients or healthy and it was called the general group. Moreover, the mean pairwise coherence (mPWC) among each pair of group A and B muscles was calculated for four phases of F-ET using Bb-IMC in CNSLBP patients and healthy subjects. Results: These results indicated a high value of A mPC in the general group and healthy subjects in the flexion phase, whereas the same A mPC in CNSLBP patients was high in all phases of F-ET. On the other hand, while B mPC was high in the general group and healthy subjects in the extension phase; it was high in all phases of F-ET in CNSLBP patients; B mPC in CNSLBP patients was high in extension, standing, and flexion phases. A mPWC and B mPWC were not significantly different between CNSLBP patients and healthy subjects in all phases of F-ET. However, only A mPWC “1 - 4” and the A mPWC “4 - 6” were significantly smaller in CNSLBP patients compared to the healthy subjects in the relaxation and flexion phases, respectively. Hence, we suggest pool coherence of Bb-IMC, not pairwise coherence of Bb-IMC, to compare CNSLBP patients and healthy subjects. Conclusions: According to the present findings, we suggest using the pool coherence of Bb-IMC in the clinical examination for CNSLBP patients and studying the probable cortical effects and the effectiveness of various treatments on corticospinal tract function in CNSLBP.

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Effect of Task Failure on Intermuscular Coherence Measures in Synergistic Muscles

Cited by 11 publications

References 65 publications

Intermuscular coherence between homologous muscles during dynamic and static movement periods of bipedal squatting

Intermuscular coherence between homologous muscles during dynamic and static movement periods of bipedal squatting

The Changes of Motor Control Strategies in Non-specific Chronic Low Back Pain During Spinal Manipulation and Muscle Energy Techniques: A Beta-band Intermuscular Pair-Wise Coherence Analysis

Comparison of the Beta-Band Intermuscular Pool Coherence Between Chronic Non-specific Low Back Pain and Healthy Subjects

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