Effect of a fatiguing protocol on motor imagery accuracy

Guillot, Aymeric; Haguenauer, Marianne; Dittmar, A.; Collet, Christian

doi:10.1007/s00421-005-1400-x

Cited by 22 publications

(15 citation statements)

References 22 publications

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“…Mental fatigue alters motor performance. Specifically, high-load mental cognitive tasks (e.g., incongruent Stroop task) for about 20min altered maximal force production of elbow flexor [38], and task-induced mental fatigue altered the speed accuracy of actual performance and MI [39]. Furthermore, repetitive MI led to participants having difficulties in maintaining focused attention on imagined movement.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Motor Imagery on Spinal Motor Neuron Excitability and Its Clinical Use in Physical Therapy

Bunno¹,

Fukumoto²,

Todo³

et al. 2017

Neurological Physical Therapy

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We investigated the influence of the imagined muscle contraction strengths on spinal motor neuron excitability in healthy volunteers. F-wave was used for assessing spinal motor excitability. The F-waves during motor imagery (MI) under 10, 30, 50, 70, and 100% maximal voluntary contractions (MVCs) were compared. Furthermore, we investigated changes of the F-waves during motor imagery for 5min. Motor imagery under 10, 30, 50, 70, and 100% maximal voluntary contractions can increase spinal motor neuron excitability. However, the imagined muscle contraction strengths were not involved in changes of spinal motor neuron excitability. Additionally, spinal motor neuron excitability after 5min from onset of motor imagery returned to the rest level. Thus, in clinical use of motor imagery, slightly imagined muscle contraction strength is enough for facilitating spinal motor neuron excitability. Also, duration of motor imagery needs to be considered.

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Section: Discussionmentioning

confidence: 99%

The Effect of Motor Imagery on Spinal Motor Neuron Excitability and Its Clinical Use in Physical Therapy

Bunno¹,

Fukumoto²,

Todo³

et al. 2017

Neurological Physical Therapy

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“…They certainly call for a closer examination in light of the fundamentally strong relation usually found between actual and mental durations, and the fact that effort and physiological conditions appear to be well represented in MI (Courtine et al 2004;Decety et al 1993;Guillot et al 2005). In this context, a study relying on different load conditions showed a dissociation between actual and imagery durations and disproportionately long mental durations only for heavier loads (Slifkin 2008).…”

Section: Introductionmentioning

confidence: 90%

Motor imagery of locomotion with an additional load: actual load experience does not affect differences between physical and mental durations

2014

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Motor imagery relies strongly on motor representations. Currently, it is widely accepted that both the imagery and execution of actions share the same neural representations (Jeannerod, Neuroimage 14:S103-S109, 2001). Comparing mental with actual movement durations opens a window through which to examine motor representations and how they relate to cognitive motor processes. The present experiment examined mental durations reported by participants standing upright who imagined walking either with or without an additional load while actually carrying or not carrying that same load. Results showed a robust effect of longer durations when imagining the additional load during mental walking, whereas physical walking with an additional load did not extend movement durations accordingly. However, experiencing an actual load during imagery did not influence mental durations substantially. This dissociation of load-related effects can be interpreted as being due to an interaction of motor processes and their cognitive representation along with a reduction in neural activity in vestibular and somatosensory areas during imagery of locomotion. It is argued that this effect might be specific to locomotion and not generalize to a broader range of movements.

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“…For example, heart rate and pulmonary frequencies are known to covary with the degree of imagined effort [Decety et al, 1991[Decety et al, , 1993Fusi et al, 2005]. Furthermore, increases in ventilation and systolic blood pressure have also been reported during MI of dumbbells lifting [Wang and Morgan, 1992;Wuyam et al, 1995], whereas similar electrodermal and thermovascular responses have been elicited during MI and motor performance [Guillot et al, 2004[Guillot et al, , 2005. Finally, the advent of brain mapping techniques like positon emission tomography and functional magnetic resonance imaging (fMRI) have shown that goaldirected actions, whether executed or imagined recruit similar (albeit non identical) neural substrates [Decety et al, 1994;Lotze et al, 1999;Mellet et al, 1998].…”

Section: Introductionmentioning

confidence: 90%

Brain activity during visual versus kinesthetic imagery: An fMRI study

Guillot

Collet

Nguyen

et al. 2008

Human Brain Mapping

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482

392

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Although there is ample evidence that motor imagery activates similar cerebral regions to those solicited during actual movements, it is still unknown whether visual (VI) and kinesthetic imagery (KI) recruit comparable or distinct neural networks. The present study was thus designed to identify, through functional magnetic resonance imaging at 3.0 Tesla in 13 skilled imagers, the cerebral structures implicated in VI and KI. Participants were scanned in a perceptual control condition and while physically executing or focusing during motor imagery on either the visual or kinesthetic components of an explicitly known sequence of finger movements. Subjects' imagery abilities were assessed using well-established psychological, chronometric, and new physiological measures from the autonomic nervous system. Compared with the perceptual condition, physical executing, VI, and KI resulted in overlapping (albeit non-identical) brain activations, including motor-related regions and the inferior and superior parietal lobules. By contrast, a divergent pattern of increased activity was observed when VI and KI were compared directly: VI activated predominantly the occipital regions and the superior parietal lobules, whereas KI yielded more activity in motor-associated structures and the inferior parietal lobule. These results suggest that VI and KI are mediated through separate neural systems, which contribute differently during processes of motor learning and neurological rehabilitation.

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Effect of a fatiguing protocol on motor imagery accuracy

Cited by 22 publications

References 22 publications

The Effect of Motor Imagery on Spinal Motor Neuron Excitability and Its Clinical Use in Physical Therapy

The Effect of Motor Imagery on Spinal Motor Neuron Excitability and Its Clinical Use in Physical Therapy

Motor imagery of locomotion with an additional load: actual load experience does not affect differences between physical and mental durations

Brain activity during visual versus kinesthetic imagery: An fMRI study

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