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Motor imagery

About: Motor imagery is a(n) research topic. Over the lifetime, 4158 publication(s) have been published within this topic receiving 126962 citation(s).

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Journal ArticleDOI: 10.1017/S0140525X00034026
Marc Jeannerod1Institutions (1)
Abstract: This paper concerns how motor actions are neurally represented and coded. Action planning and motor preparation can be studied using a specific type of representational activity, motor imagery. A close functional equivalence between motor imagery and motor preparation is suggested by the positive effects of imagining movements on motor learning, the similarity between the neural structures involved, and the similar physiological correlates observed in both imaging and preparing. The content of motor representations can be inferred from motor images at a macroscopic level, based on global aspects of the action (the duration and amount of effort involved) and the motor rules and constraints which predict the spatial path and kinematics of movements. A more microscopic neural account calls for a representation of object-oriented action. Object attributes are processed in different neural pathways depending on the kind of task the subject is performing. During object-oriented action, a pragmatic representation is activated in which object affordances are transformed into specific motor schemas (independently of other tasks such as object recognition). Animal as well as human clinical data implicate the posterior parietal and premotor cortical areas in schema instantiation. A mechanism is proposed that is able to encode the desired goal of the action and is applicable to different levels of representational organization.

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Topics: Motor imagery (64%), Motor learning (64%), Motor control (62%) ...read more

2,030 Citations


Open accessJournal ArticleDOI: 10.1006/NIMG.2001.0832
01 Jul 2001-NeuroImage
Abstract: Paradigms drawn from cognitive psychology have provided new insight into covert stages of action. These states include not only intending actions that will eventually be executed, but also imagining actions, recognizing tools, learning by observation, or even understanding the behavior of other people. Studies using techniques for mapping brain activity, probing cortical excitability, or measuring the activity of peripheral effectors in normal human subjects and in patients all provide evidence of a subliminal activation of the motor system during these cognitive states. The hypothesis that the motor system is part of a simulation network that is activated under a variety of conditions in relation to action, either self-intended or observed from other individuals, will be developed. The function of this process of simulation would be not only to shape the motor system in anticipation to execution, but also to provide the self with information on the feasibility and the meaning of potential actions.

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Topics: Motor cognition (61%), Motor imagery (58%), Common coding theory (58%) ...read more

1,876 Citations


Journal ArticleDOI: 10.1016/S1474-4422(09)70150-4
01 Aug 2009-Lancet Neurology
Abstract: Loss of functional movement is a common consequence of stroke for which a wide range of interventions has been developed. In this Review, we aimed to provide an overview of the available evidence on interventions for motor recovery after stroke through the evaluation of systematic reviews, supplemented by recent randomised controlled trials. Most trials were small and had some design limitations. Improvements in recovery of arm function were seen for constraint-induced movement therapy, electromyographic biofeedback, mental practice with motor imagery, and robotics. Improvements in transfer ability or balance were seen with repetitive task training, biofeedback, and training with a moving platform. Physical fitness training, high-intensity therapy (usually physiotherapy), and repetitive task training improved walking speed. Although the existing evidence is limited by poor trial designs, some treatments do show promise for improving motor recovery, particularly those that have focused on high-intensity and repetitive task-specific practice.

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Topics: Motor imagery (53%), Biofeedback (52%)

1,545 Citations


Journal ArticleDOI: 10.1109/5.939829
Gert Pfurtscheller1, Christa Neuper1Institutions (1)
01 Jul 2001-
Abstract: Motor imagery can modify the neuronal activity in the primary sensorimotor areas in a very similar way as observable with a real executed movement. One part of EEG-based brain-computer interfaces (BCI) is based on the recording and classification of circumscribed and transient EEG changes during different types of motor imagery such as, e.g., imagination of left-hand, right-hand, or foot movement. Features such as, e.g., band power or adaptive autoregressive parameters are either extracted in bipolar EEG recordings overlaying sensorimotor areas or from an array of electrodes located over central and neighboring areas. For the classification of the features, linear discrimination analysis and neural networks are used. Characteristic for the Graz BCI is that a classifier is set up in a learning session and updated after one or more sessions with online feedback using the procedure of "rapid prototyping." As a result, a discrimination of two brain states (e.g., leftversus right-hand movement imagination) can be reached within only a few days of training. At this time, a tetraplegic patient is able to operate an EEG-based control of a hand orthosis with nearly 100% classification accuracy by mental imagination of specific motor commands.

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1,428 Citations


Journal ArticleDOI: 10.1038/35090055
Abstract: Mental imagery has, until recently, fallen within the purview of philosophy and cognitive psychology. Both enterprises have raised important questions about imagery, but have not made substantial progress in answering them. With the advent of cognitive neuroscience, these questions have become empirically tractable. Neuroimaging studies, combined with other methods (such as studies of brain-damaged patients and of the effects of transcranial magnetic stimulation), are revealing the ways in which imagery draws on mechanisms used in other activities, such as perception and motor control. Because of its close relation to these basic processes, imagery is now becoming one of the best understood 'higher' cognitive functions.

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Topics: Creative visualization (60%), Motor imagery (59%), Cognitive neuropsychology (57%) ...read more

1,390 Citations


Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202211
2021333
2020403
2019364
2018316
2017312

Top Attributes

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Topic's top 5 most impactful authors

Cuntai Guan

59 papers, 2.7K citations

Aymeric Guillot

59 papers, 3K citations

Gert Pfurtscheller

37 papers, 6.3K citations

Kai Keng Ang

30 papers, 1.1K citations

Gernot Müller-Putz

27 papers, 1K citations

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