Enhanced precision of ankle torque measure with an open-unit dynamometer mounted with a 3D force-torque sensor

Toumi, Anis; Leteneur, Sébastien; Gillet, Christophe; Debril, J.-F.; Découfour, Nicolas; Barbier, Franck; Jakobi, Jennifer M.; Simoneau-Buessinger, Émilie

doi:10.1007/s00421-015-3210-0

Cited by 14 publications

(15 citation statements)

References 36 publications

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“…A custom‐designed dynamometer (Simoneau‐Buessinger et al., ; Toumi et al., ) was used to record the isometric net joint torque around the right ankle at 100 Hz.…”

Section: Methodsmentioning

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

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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.

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“…A custom‐designed dynamometer (Simoneau‐Buessinger et al., ; Toumi et al., ) was used to record the isometric net joint torque around the right ankle at 100 Hz.…”

Section: Methodsmentioning

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

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“…An ankle ergometer 'Booted, Open-unit device, Three dimension sensor, Transportable, Ergometer (B.O.T.T.E.)' was used to record isometric torque at the ankle joint in both DF and PF (Toumi et al 2015). The participant was seated with the hip at ~60°, the dominant leg extended straight forward and the ankle joint placed at 0° (the angle between the plantar surface and the leg D r a f t was a right angle).…”

Section: Methodsmentioning

confidence: 99%

“…, practice (familiarization) (Graves et al 1990), temperature (Morrison et al 2004), ventilation (Li and Laskin 2006), prior physical or mental activities (Bishop 2003, Marcora et al 2009, dynamometer (Toumi et al 2015) and instructions…”

mentioning

confidence: 99%

Differential impact of visual feedback on plantar- and dorsi-flexion maximal torque output

Toumi

Jakobi

Simoneau-Buessinger

2016

Appl. Physiol. Nutr. Metab.

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The effect of visual feedback on enhancing isometric maximal voluntary contractions (MVC) was evaluated. Twelve adults performed plantar-flexion and dorsi-flexion MVCs in 3 conditions (no visual feedback, visual feedback, and visual feedback with target). There was no significant effect of visual conditions on dorsi-flexion MVC but there was an effect on plantar-flexion. Irrespective of whether a target was evident, visual feedback increased plantar-flexion MVC by ∼15%. This study highlights the importance of optimal feedback to enhance MVC.

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“…In this manner, torques/forces generated in other parts of the body can contaminate the examined joint torque output. To achieve a direct measure of the contribution of body adjustments to net unilateral and bilateral torque outputs, a customized isometric plantar-flexion (PF) dynamometer was designed [ 25 ]. This innovative ‘Booted, Open-Unit, Three dimension, Transportable, Ergometer’ (B.O.T.T.E.)…”

Section: Introductionmentioning

confidence: 99%

“…The force-torque sensor is situated under a plate on which is placed the sole of the foot. Please see [ 25 ] for more details. The individual in this picture has given written informed consent (as outlined in PLOS consent form) to publish this image.…”

Section: Introductionmentioning

confidence: 99%

Bilateral Strength Deficit Is Not Neural in Origin; Rather Due to Dynamometer Mechanical Configuration

et al. 2015

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During maximal contractions, the sum of forces exerted by homonymous muscles unilaterally is typically higher than the sum of forces exerted by the same muscles bilaterally. However, the underlying mechanism(s) of this phenomenon, which is known as the bilateral strength deficit, remain equivocal. One potential factor that has received minimal attention is the contribution of body adjustments to bilateral and unilateral force production. The purpose of this study was to evaluate the plantar-flexors in an innovative dynamometer that permitted the influence of torque from body adjustments to be adapted. Participants were identically positioned between two setup configurations where torques generated from body adjustments were included within the net ankle torque (locked-unit) or independent of the ankle (open-unit). Twenty healthy adult males performed unilateral and bilateral maximal voluntary isometric plantar-flexion contractions using the dynamometer in the open and locked-unit mechanical configurations. While there was a significant bilateral strength deficit in the locked-unit (p = 0.01), it was not evident in the open-unit (p = 0.07). In the locked-unit, unilateral torque was greater than in the open-unit (p<0.001) and this was due to an additional torque from the body since the electromyographic activity of the agonist muscles did not differ between the two setups (p>0.05). This study revealed that the mechanical configuration of the dynamometer and then the body adjustments caused the observation of a bilateral strength deficit.

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Enhanced precision of ankle torque measure with an open-unit dynamometer mounted with a 3D force-torque sensor

Abstract: Assessment of plantar-flexion torque should be performed with an open-unit dynamometer mounted with a 3D sensor that is exclusive of accessory muscles but inclusive of all ankle joint movements.

Cited by 14 publications

References 36 publications

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

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

Differential impact of visual feedback on plantar- and dorsi-flexion maximal torque output

Bilateral Strength Deficit Is Not Neural in Origin; Rather Due to Dynamometer Mechanical Configuration

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