Does the force level modulate the cortical activity during isometric contractions after a cervical spinal cord injury?

Crémoux, Sylvain; Tallet, Jessica; Berton, Éric; Maso, Fabien Dal; Amarantini, David

doi:10.1016/j.clinph.2012.11.007

Cited by 14 publications

(15 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous methodological studies revealed that time‐frequency transformation was most suitable to conventional frequency domain analysis for analyzing coherence in non‐stationary electrophysiological signals (Zhan et al ., ; Allen & MacKinnon, ; Bigot et al ., ), even though the quantification of corticomuscular interactions is subsequently quantified over a specified time period of interest. C3 EEG electrode was taken as the optimal location for studying cortical activity dedicated to right elbow muscle contractions, in accordance with previous investigations (Siemionow et al ., ; Caviness et al ., ; Tuncel et al ., ; Cremoux et al ., ,b).…”

Section: Methodsmentioning

confidence: 98%

“…Prior the experimental session, participants performed 3 so‐called relative Maximum Voluntary Contractions (rMVC) around the right elbow joint in flexion. The rMVC was determined as the highest net moment reached while keeping at rest all the muscles not involved in the task, especially face and neck muscles, to avoid muscles artifact in EEG recordings (Dal Maso et al ., ; Cremoux et al ., ,b). The experimental protocol consisted of 21 elbow isometric flexion contractions at 25, 50 and 75% rMVC randomized in seven sets of contractions.…”

Section: Methodsmentioning

confidence: 99%

“…The required force level was presented with a visual feedback (Presentation program, NeuroBehavioral Systems Inc. Albany, USA) appearing on a screen located 1 m in front of the participants. A full description of the experimental protocol is given in Cremoux et al (2013a).…”

Section: Protocolmentioning

confidence: 99%

See 2 more Smart Citations

Impaired corticomuscular coherence during isometric elbow flexion contractions in humans with cervical spinal cord injury

Crémoux

Tallet

Maso

et al. 2017

Eur J of Neuroscience

Self Cite

View full text Add to dashboard Cite

After spinal cord injury (SCI), the reorganization of the neuromuscular system leads to increased antagonist muscles' co-activation-that is, increased antagonist vs. agonist muscles activation ratio-during voluntary contractions. Increased muscle co-activation is supposed to result from reduced cortical influences on spinal mechanisms inhibiting antagonist muscles. The assessment of the residual interactions between cortical and muscles activity with corticomuscular coherence (CMC) in participants with SCI producing different force levels may shed new lights on the regulation of muscle co-activation. To achieve this aim, we compared the net joint torque, the muscle co-activation and the CMC ~ 10 and ~ 20 Hz with both agonist and antagonist muscles in participants with SCI and healthy participants performing actual isometric elbow flexion contractions at three force levels. For all participants, overall CMC and muscle co-activation decreased with the increase in the net joint torque, but only CMC ~ 10 Hz was correlated with muscle co-activation. Participants with SCI had greater muscle co-activation and lower CMC ~ 10 Hz, at the highest force levels. These results emphasize the importance of CMC as a mechanism that could take part in the modulation of muscle co-activation to maintain a specific force level. Lower CMC ~ 10 Hz in SCI participants may reflect the decreased cortical influence on spinal mechanisms, leading to increased muscle co-activation, although plasticity of the corticomuscular coupling seems to be preserved after SCI to modulate the force level. Clinically, the CMC may efficiently evaluate the residual integrity of the neuromuscular system after SCI and the effects of rehabilitation.

show abstract

Section: Methodsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Impaired corticomuscular coherence during isometric elbow flexion contractions in humans with cervical spinal cord injury

Crémoux

Tallet

Maso

et al. 2017

Eur J of Neuroscience

Self Cite

View full text Add to dashboard Cite

show abstract

“…The control and the modulation of the net torque produced around a joint are essential for humans for successful interactions with their environment. However, the stability of the net joint torque production depends on the torque level (Carlton & Newell, ; Christou, Grossman, & Carlton, ; Cremoux, Tallet, Berton, Dal Maso, & Amarantini, ) and on the phases of the force production, namely, increasing, holding ,or decreasing force phases (IFP, HFP and DFP, respectively) (Masumoto & Inui, ; Naik, Patten, Lodha, Coombes, & Cauraugh, ; Park, Kwon, Solis, Lodha, & Christou, ). The modulation in net joint torque stability could result from an altered control of the activation of agonist and antagonist muscles, respectively, acting in the direction or in the opposite direction of the net joint torque (Basmajian, ).…”

Section: Introductionmentioning

confidence: 99%

“…During voluntary isometric contractions, M1 activation can be evaluated with electroencephalography (EEG) by quantifying the event‐related desynchronization (ERD), i.e., a decrease of the EEG spectral power in the “beta” frequency band (~20 Hz) (Pfurtscheller & Da Silva, ). It is known that the magnitude of the ERD is modulated with the force level and the difficulty of the task (Cremoux, Tallet, Berton, Dal Maso, & Amarantini, ; Stančák, Riml, & Pfurtscheller, ). More precisely, Cremoux et al.…”

Section: Introductionmentioning

confidence: 99%

Effect of the phase of force production on corticomuscular coherence with agonist and antagonist muscles

Desmyttere

Mathieu

Begon

et al. 2018

Eur J of Neuroscience

Self Cite

View full text Add to dashboard Cite

During isometric contractions, the net joint torque stability is modulated with the force production phases, i.e., increasing (IFP), holding (HFP), and decreasing force (DFP) phases. It was hypothesized that this modulation results from an altered cortical control of agonist and antagonist muscle activations. Eleven healthy participants performed 50 submaximal isometric ankle plantar flexion contractions. The force production phase effect (IFP, HFP and DFP) was assessed on the net joint torque stability, agonist and antagonist muscles activations, cortical activation, and corticomuscular coherence (CMC) with agonist and antagonist muscles. In comparison to HFP, the net joint torque stability, the agonist muscles activation and the CMC with agonist muscles were lower during IFP and even more during DFP. Antagonist muscle activations, cortical activations and CMC with antagonist muscles were higher during HFP than during IFP only. Increased CMC with agonist and antagonist muscles appeared to enhance the fine motor control. At a cortical level, agonist and antagonist muscle activations seemed to be controlled independently according to their muscle function and the phase of force production. Results revealed that CMC was an adequate measure to investigate the cortical regulation of agonist and antagonist muscle activations. This may have potential applications for patients with altered muscle activations.

show abstract

Effect of training status on beta-range corticomuscular coherence in agonist vs. antagonist muscles during isometric knee contractions

et al. 2017

View full text Add to dashboard Cite

Antagonist muscle co-activation is thought to be partially regulated by cortical influences, but direct motor cortex involvement is not fully understood. Corticomuscular coherence (CMC) measures direct functional coupling of the motor cortex and muscles. As antagonist co-activation differs according to training status, comparison of CMC in agonist and antagonist muscles and in strength-trained and endurance-trained individuals may provide in-depth knowledge of cortical implication in antagonist muscle co-activation. Electroencephalographic and electromyographic signals were recorded, while 10 strength-trained and 11 endurance-trained participants performed isometric knee contractions in flexion and extension at various torque levels. CMC magnitude in 13-21 and 21-31 Hz frequency bands was quantified by CMC analysis between Cz electroencephalographic electrode activity and all electromyographic signals. CMC was significant in both 13-21 and 21-31 Hz frequency bands in flexor and extensor muscles regardless of participant group, torque level, and direction of contraction. CMC magnitude decreased more in antagonist than in agonist muscles as torque level increased. Finally, CMC magnitude was higher in strength-trained than in endurance-trained participants. These findings provide experimental evidence that the motor cortex directly regulates both agonist and antagonist muscles. Nevertheless, the mechanisms underlying muscle activation may be specific to their function. Between-group modulation of corticomuscular coherence may result from training-induced adaptation, re-emphasizing that corticomuscular coherence analysis may be efficient in characterizing corticospinal adaptations after long-term muscle specialization.

show abstract

Does the force level modulate the cortical activity during isometric contractions after a cervical spinal cord injury?

Cited by 14 publications

References 36 publications

Impaired corticomuscular coherence during isometric elbow flexion contractions in humans with cervical spinal cord injury

Impaired corticomuscular coherence during isometric elbow flexion contractions in humans with cervical spinal cord injury

Effect of the phase of force production on corticomuscular coherence with agonist and antagonist muscles

Effect of training status on beta-range corticomuscular coherence in agonist vs. antagonist muscles during isometric knee contractions

Contact Info

Product

Resources

About