Influence of different transcranial magnetic stimulation current directions on the corticomotor control of lumbar erector spinae muscles during a static task

Desmons, Mikaël; Rohel, Antoine; Desgagnés, Amélie; Mercier, Catherine; Massé‐Alarie, Hugo

doi:10.1016/j.brs.2021.10.021

Cited by 5 publications

(8 citation statements)

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“…Crucially, M1 is known to integrate inputs from some of these structures and the latter are differentially recruited according to current orientation. For example, late I-waves evoked by AP orientation could activate axons of neurons of the premotor cortex projecting to the corticospinal cells (Groppa et al ., 2012; Volz et al ., 2015; Aberra et al ., 2020; Siebner, 2020; Desmons et al ., 2021). Recently, Oldrati et al (2021) reported that following offline 1Hz inhibitory repetitive TMS over the dorsal premotor cortex (PMd), corticospinal excitability assessed during kinesthetic MI was not significantly higher than rest condition (Oldrati et al ., 2021).…”

Section: Discussionmentioning

confidence: 99%

The recruitment of indirect-waves within primary motor cortex during motor imagery: A directional Transcranial Magnetic Stimulation study

Neige

Ciechelski

Lebon

2022

Preprint

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Motor imagery (MI) refers to the mental simulation of an action without any overt movement. While numerous transcranial magnetic stimulation (TMS) studies provided evidence for a modulation of corticospinal excitability and intracortical inhibition during MI, the neural signature within the primary motor cortex is not clearly established. In the current study, we used directional TMS to probe the modulation of the excitability of early and late indirect-waves (I-waves) generating pathways during MI. Corticospinal responses evoked by TMS with posterior-anterior (PA) and anterior-posterior (AP) current flow within primary motor cortex evoke preferentially early and late I-waves, respectively. Seventeen participants were instructed to stay at rest or to imagine isometric maximal contractions of the right flexor carpi radialis. We demonstrated that the increase of corticospinal excitability during MI is greater with PA than AP orientation. By using paired-pulse stimulations, we confirmed that short-interval intracortical inhibition (SICI) increased during MI in comparison to rest with PA orientation whereas we found that it decreased with AP orientation. Overall, these results indicate that the specific early I-waves generating pathway activated by PA orientation is probably more sensitive to the corticospinal excitability and intracortical inhibition modulations induced by MI.

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Section: Discussionmentioning

confidence: 99%

The recruitment of indirect-waves within primary motor cortex during motor imagery: A directional Transcranial Magnetic Stimulation study

Neige

Ciechelski

Lebon

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…Crucially, M1 is known to integrate inputs from some of these structures, and the latter are differentially recruited according to the current orientation. For example, late I‐waves evoked by AP orientation could activate axons of neurons of the premotor cortex projecting to the corticospinal cells (Aberra et al, 2020; Desmons et al, 2021; Groppa et al, 2012; Siebner, 2020; Volz et al, 2015). Recently, Oldrati et al (2021) reported that following off‐line 1‐Hz inhibitory repetitive TMS over the dorsal premotor cortex (PMd), corticospinal excitability assessed during kinesthetic MI was not significantly higher than rest condition (Oldrati et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

The recruitment of indirect waves within primary motor cortex during motor imagery: A directional transcranial magnetic stimulation study

Neige

Ciechelski

Lebon

2022

Eur J of Neuroscience

View full text Add to dashboard Cite

Motor imagery (MI) refers to the mental simulation of an action without overt movement. While numerous transcranial magnetic stimulation (TMS) studies provided evidence for a modulation of corticospinal excitability and intracortical inhibition during MI, the neural signature within the primary motor cortex is not clearly established. In the current study, we used directional TMS to probe the modulation of the excitability of early and late indirect waves (I‐waves) generating pathways during MI. Corticospinal responses evoked by TMS with posterior–anterior (PA) and anterior–posterior (AP) current flow within the primary motor cortex evoke preferentially early and late I‐waves, respectively. Seventeen participants were instructed to stay at rest or to imagine maximal isometric contractions of the right flexor carpi radialis. We demonstrated that the increase of corticospinal excitability during MI is greater with PA than AP orientation. By using paired‐pulse stimulations, we confirmed that short‐interval intracortical inhibition (SICI) increased during MI in comparison to rest with PA orientation, whereas we found that it decreased with AP orientation. Overall, these results indicate that the pathways recruited by PA and AP orientations that generate early and late I‐waves are differentially modulated by MI.

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“…In this participant, stimulation was applied at 100% MSO and consistent MEPs were obtained across the experiment. Small MEP amplitude at 120%–130% AMT and the large between‐participant variability make the use of a pre‐defined MEP test amplitude (e.g., 1 mV) impractical for back muscles (Desmons et al, 2021). Although stimulation parameters were optimised for the LM muscle, TES MEPs were also measured as previous studies showed that a single stimulation site can be used to probe multiple trunk muscles (Chiou et al, 2016; Masse‐Alarie et al, 2018; Tsao, Tucker, & Hodges, 2011).…”

Section: Methodsmentioning

confidence: 99%

Effects of different modalities of afferent stimuli of the lumbo‐sacral area on control of lumbar paravertebral muscles

Massé‐Alarie

Shraim

Taylor

et al. 2022

Eur J of Neuroscience

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Somatosensory feedback to the central nervous system is essential to plan, perform and refine spine motor control. However, the influence of somatosensory afferent input from the trunk on the motor output to trunk muscles has received little attention. The objective was to compare the effects of distinct modalities of afferent stimulation on the net motoneuron and corticomotor excitability of paravertebral muscles. Fourteen individuals were recruited. Modulation of corticospinal excitability (motor-evoked potential [MEP]) of

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Influence of different transcranial magnetic stimulation current directions on the corticomotor control of lumbar erector spinae muscles during a static task

Cited by 5 publications

References 0 publications

The recruitment of indirect-waves within primary motor cortex during motor imagery: A directional Transcranial Magnetic Stimulation study

The recruitment of indirect-waves within primary motor cortex during motor imagery: A directional Transcranial Magnetic Stimulation study

The recruitment of indirect waves within primary motor cortex during motor imagery: A directional transcranial magnetic stimulation study

Effects of different modalities of afferent stimuli of the lumbo‐sacral area on control of lumbar paravertebral muscles

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