Motor Imagery and Paired Associative Stimulation in Poststroke Rehabilitation: Dissociating Motor and Electrophysiological Effects - Archive ouverte HAL Access content directly
Journal Articles Applied Sciences Year : 2023

Motor Imagery and Paired Associative Stimulation in Poststroke Rehabilitation: Dissociating Motor and Electrophysiological Effects

Nabila Brihmat
Mohamed Tarri
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Benoit Lepage
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Emmeline Montane
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David Gasq
Philippe Marque
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  • IdRef : 10886300X

Abstract

Paired associative stimulation (PAS) is an intervention that modulates cortical plasticity. Motor imagery (MI) is used in the rehabilitation of stroke patients. We aimed to evaluate the possible synergistic effect of associating both interventions for potentiating motor recovery poststroke. MIPAS is a single-center, randomized controlled trial that enrolled 24 hemiparetic poststroke participants. Three single-session interventions were tested in a crossover design: PAS/MI, PAS, and ShamPAS/MI during which the affected Extensor Carpi Radialis (ECR) muscle was targeted. During MI, the participants were instructed to imagine extending their paretic wrist. We used Sham, subthreshold stimulation during ShamPAS. Changes in ECR Motor-Evoked Potential (MEP) areas and paretic wrist Range of Motion (aROM) during active extension were compared between the interventions. We observed no significant superior effect of any intervention, neither on MEP nor on wrist aROM. A time of assessment effect was highlighted for both outcome measures, with MEP- and aROM-measured post-interventions significantly higher than those measured pre-intervention. Despite the beneficial effect of each intervention on participant paretic wrist motor function, not always associated with MEP change, our results do not highlight a specific advantage in combining PAS and MI interventions in post-stroke motor rehabilitation.
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hal-04639921 , version 1 (09-07-2024)

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Nabila Brihmat, Evelyne Castel-Lacanal, Mohamed Tarri, Benoit Lepage, Emmeline Montane, et al.. Motor Imagery and Paired Associative Stimulation in Poststroke Rehabilitation: Dissociating Motor and Electrophysiological Effects. Applied Sciences, 2023, 13 (10), pp.6063. ⟨10.3390/app13106063⟩. ⟨hal-04639921⟩
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