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Action observation produces motor resonance in Parkinson's disease.

ABSTRACT: Observation of movement activates the observer's own motor system, influencing the performance of actions and facilitating social interaction. This motor resonance is demonstrated behaviourally through visuomotor priming, whereby response latencies are influenced by the compatibility between an intended action and an observed (task-irrelevant) action. The impact of movement disorders such as Parkinson's disease (PD) on motor resonance is unclear, as previous studies of visuomotor priming have not separated imitative compatibility (specific to human movement) from general stimulus-response compatibility effects. We examined visuomotor priming in 23 participants with mild-to-moderate PD and 24 healthy older adults, using a task that pitted imitative compatibility against general stimulus-response compatibility. Participants made a key press after observing a task-irrelevant moving human finger or rectangle that was either compatible or incompatible with their response. Imitative compatibility effects, rather than general stimulus-response compatibility effects, were found specifically for the human finger. Moreover, imitative compatibility effects did not differ between groups, indicating intact motor resonance in the PD group. These findings constitute the first unambiguous demonstration of imitative priming in both PD and healthy ageing, and have implications for therapeutic techniques to facilitate action, as well as the understanding of social cognition in PD.

SUBMITTER: Bek J

PROVIDER: S-EPMC6001452 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature

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Action observation produces motor resonance in Parkinson's disease.

Bek Judith J Gowen Emma E Vogt Stefan S Crawford Trevor T Poliakoff Ellen E

Journal of neuropsychology 20170911 2

Observation of movement activates the observer's own motor system, influencing the performance of actions and facilitating social interaction. This motor resonance is demonstrated behaviourally through visuomotor priming, whereby response latencies are influenced by the compatibility between an intended action and an observed (task-irrelevant) action. The impact of movement disorders such as Parkinson's disease (PD) on motor resonance is unclear, as previous studies of visuomotor priming have no ...[more]

PMID: 28895316

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Project description:BackgroundCombining action observation (AO) and motor imagery (MI) training may induce greater brain activity in areas usually involved in Parkinson's disease (PD) and lead to greater behavioral and neurophysiological effects than when used separately.AimTo determine the effects of combining AO, MI, and gait training on balance and freezing of gait in individuals with PD.DesignThis is a single-blinded, randomized controlled clinical trial.SettingLaboratory of Intervention and Analysis of Movement (LIAM) from the Department of Physical Therapy of a Brazilian University.PopulationStudy sample consisted of individuals diagnosed with idiopathic PD by a neurologist specialized in movement disorders.Methods39 individuals with PD were divided into experimental (EG=21) and control groups (CG=18). EG performed 12 sessions of AO, MI, and gait training, whereas CG watched PD-related educational videos and performed 12 sessions of gait training. Balance (measured using the Mini Balance Evaluation Systems Test [MiniBESTest]) and freezing of gait (measured using the Freezing of Gait Questionnaire) were reassessed one day after the end of the intervention.ResultsWe did not observe significant intra- and intergroup differences in freezing of gait. For the EG, we observed a significant intragroup difference in the total score of MiniBESTest (F=5.2; P=0.02), and sensory orientation (F=4.5; P=0.04) and dynamic gait (F=3.6; P=0.03) domains. MiniBESTest domains were not different between groups.ConclusionsCombining AO, MI, and gait training was not more effective than isolated gait training for balance and freezing of gait in individuals with PD.Clinical rehabilitation impactMI training can moderate AO effects and enhance motor learning when both therapies are combined. Therefore, this approach may still have the potential to be included in the treatment of PD. New studies should investigate whether the factors that influence these results are related to the protocol's sensitivity in changing the evaluated parameters or to the time and intensity of AO and MI training.

Dataset Information

Action observation produces motor resonance in Parkinson's disease.

Publications

Action observation produces motor resonance in Parkinson's disease.

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