نتائج البحث - "Motor Imagery"

1

An action-observation/motor-imagery based approach to differentiate disorders of consciousness: what is beneath the tip of the iceberg?

المؤلفون: Rocco Salvatore Calabrò, Loris Pignolo, Antonino Naro, Lucia Francesca Lucca

المصدر: Restorative Neurology and Neuroscience. 39:181-197

الوصف: Background: The evaluation of motor imagery in persons with prolonged Disorders of Consciousness (pDOC) is a practical approach to differentiate between patients with Minimally Conscious State (MCS) and Unresponsive Wakefulness Syndrome (UWS) and to identify residual awareness even in individuals with UWS. Investigating the influence of motor observation on motor imagery could be helpful in this regard. Objective: In order to corroborate the clinical diagnosis and identify misdiagnosed individuals, we used EEG recordings, to assess the influence of the low-level perceptual and motoric mechanisms on motor observation on motor imagery, taking into account the role of the high-level cognitive mechanisms in patients with pDOC. Methods: We assessed the influence of motor observation of walking in first-person or third-person view (by a video provision) on motor imagery of walking in the first-person view on the visual N190 (expression of motor observation processing), the readiness potential (RP) (expressing motor preparation), and the P3 component (high-level cognitive processes) in a sample of 10 persons with MCS, 10 with UWS, and 10 healthy controls (CG). Specifically, the video showed a first-view or third-view walk down the street while the participants were asked to imagine a first-view walking down the street. Results: CG showed greater N190 response (low-level sensorimotor processing) in the non-matching than in the matching condition. Conversely, the P3 and RP responses (high-level sensorimotor processing) were greater in the matching than in the non-matching condition. Remarkably, 6 out of 10 patients with MCS showed the preservation of both high- and low-level sensorimotor processing. One UWS patient showed responses similar to those six patients, suggesting a preservation of cognitively-mediated sensorimotor processing despite a detrimental motor preparation process. The remaining patients with MCS did not show diversified EEG responses, suggesting limited cognitive functioning. Conclusions: Our study suggests that identifying the low-level visual and high-level motor preparation processes in response to a simple influence of motor observation of motor imagery tasks potentially supports the clinical differential diagnosis of with MCS and UWS. This might help identify UWS patients which were misdiagnosed and who deserve more sophisticated diagnoses.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1323410acd749bd365166ec57cab2b42Test
https://doi.org/10.3233/rnn-201130Test

2

Cospeech gestures are a window into the effects of Parkinson’s disease on action representations

المؤلفون: Judith Holler, Stacey Humphries, Ellen Poliakoff, Trevor J. Crawford

المصدر: Journal of Experimental Psychology-General, 150, 8, pp. 1581-1597
Journal of Experimental Psychology: General
Journal of Experimental Psychology-General, 150, 1581-1597

الوصف: Parkinson's disease impairs motor function and cognition, which together affect language and communication. Cospeech gestures are a form of language-related actions that provide imagistic depictions of the speech content they accompany. Gestures rely on visual and motor imagery, but it is unknown whether gesture representations require the involvement of intact neural sensory and motor systems. We tested this hypothesis with a fine-grained analysis of cospeech action gestures in Parkinson's disease. Thirty-seven people with Parkinson's disease and 33 controls described 2 scenes featuring actions which varied in their inherent degree of bodily motion. In addition to the perspective of action gestures (gestural viewpoint/first- vs. third-person perspective), we analyzed how Parkinson's patients represent manner (how something/someone moves) and path information (where something/someone moves to) in gesture, depending on the degree of bodily motion involved in the action depicted. We replicated an earlier finding that people with Parkinson's disease are less likely to gesture about actions from a first-person perspective-preferring instead to depict actions gesturally from a third-person perspective-and show that this effect is modulated by the degree of bodily motion in the actions being depicted. When describing high-motion actions, the Parkinson's group were specifically impaired in depicting manner information in gesture and their use of third-person path-only gestures was significantly increased. Gestures about low-motion actions were relatively spared. These results inform our understanding of the neural and cognitive basis of gesture production by providing neuropsychological evidence that action gesture production relies on intact motor network function. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

وصف الملف: text; application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1db859ea901ae677219f9300a08696faTest
https://doi.org/10.1037/xge0001002Test

3

Combined action observation and motor imagery: An intervention to combat the neural and behavioural deficits associated with developmental coordination disorder

المؤلفون: Jacqueline Williams, Greg Wood, Paul S. Holmes, Ben Marshall, Matthew W. Scott, David J. Wright

المصدر: Neuroscience & Biobehavioral Reviews. 127:638-646

الوصف: Action observation (AO) and motor imagery (MI) have been used separately across different populations to alleviate movement impairment. Recently these two forms of covert motor simulation have been combined (combined action observation and motor imagery; AOMI), resulting in greater neurophysiological activity in the motor system, and more favourable behavioural outcomes when compared to independent AO and MI. This review aims to outline how some of the neural deficits associated with developmental coordination disorder (DCD) are evident during AO and MI, and highlight how these motor simulation techniques have been used independently to improve motor skill learning in children in this population. The growing body of evidence indicating that AOMI is superior to the independent use of either AO and MI is then synthesised and discussed in the context of children with DCD. To conclude, recommendations to optimise the delivery of AOMI for children with DCD are provided and future avenues for research are highlighted.

وصف الملف: text

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cffdba289e6aff04d3266c2942d473e5Test
https://doi.org/10.1016/j.neubiorev.2021.05.015Test

4

The topographical organization of motor processing: An ALE meta-analysis on six action domains and the relevance of Broca's region

المؤلفون: Emiliano Zaccarella, Giorgio Papitto, Angela D. Friederici

المصدر: NeuroImage, Vol 206, Iss, Pp 116321-(2020)
NeuroImage

مصطلحات موضوعية: observation, execution, Computer science, Topographic map (neuroanatomy), Physics::Medical Physics, imitation, bepress|Life Sciences|Neuroscience and Neurobiology, 0302 clinical medicine, Neural Pathways, Activation Likelihood Estimation, bepress|Life Sciences|Neuroscience and Neurobiology|Cognitive Neuroscience, media_common, Cognitive science, Likelihood Functions, learning, 05 social sciences, fMRI, Brain, Action domains, Cognition, Magnetic Resonance Imaging, Broca's region, PsyArXiv|Neuroscience|Cognitive Neuroscience, Neurology, Meta-analytic connectivity modeling, Imagination, Motor learning, Imitation, imagery, Movement, Cognitive Neuroscience, media_common.quotation_subject, 050105 experimental psychology, lcsh:RC321-571, 03 medical and health sciences, Motor imagery, Broca’s area, Connectome, Humans, 0501 psychology and cognitive sciences, Broca's area, lcsh:Neurosciences. Biological psychiatry. Neuropsychiatry, Functional Neuroimaging, Imitative Behavior, Broca Area, meta-analysis, PET, PsyArXiv|Neuroscience, Action (philosophy), Positron-Emission Tomography, ALE, Mental representation, action, planning, 030217 neurology & neurosurgery

الوصف: Action is a cover term used to refer to a large set of motor processes differing in domain specificities (e.g. execution or observation). Here we review neuroimaging evidence on action processing (N = 416; Subjects = 5912) using quantitative Activation Likelihood Estimation (ALE) and Meta-Analytic Connectivity Modeling (MACM) approaches to delineate the functional specificities of six domains: (1) Action Execution, (2) Action Imitation, (3) Motor Imagery, (4) Action Observation, (5) Motor Learning, (6) Motor Preparation. Our results show distinct functional patterns for the different domains with convergence in posterior BA44 (pBA44) for execution, imitation and imagery processing. The functional connectivity network seeding in the motor-based localized cluster of pBA44 differs from the connectivity network seeding in the (language-related) anterior BA44. The two networks implement distinct cognitive functions. We propose that the motor-related network encompassing pBA44 is recruited when processing movements requiring a mental representation of the action itself.

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b3ebb271708887a9674c7577349a9729Test

5

Bimanual coupling effect during a proprioceptive stimulation

المؤلفون: Francesca Garbarini, Marco Bove, Ambra Bisio, Monica Biggio

المصدر: Scientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
Scientific Reports

الوصف: Circle-line drawing paradigm is used to study bimanual coupling. In the standard paradigm, subjects are asked to draw circles with one hand and lines with the other hand; the influence of the concomitant tasks results in two “elliptical” figures. Here we tested whether proprioceptive information evoked by muscle vibration inducing a proprioceptive illusion (PI) of movement at central level, was able to affect the contralateral hand drawing circles or lines. A multisite 80 Hz-muscle vibration paradigm was used to induce the illusion of circle- and line-drawing on the right hand of 15 healthy participants. During muscle vibration, subjects had to draw a congruent or an incongruent figure with the left hand. The ovalization induced by PI was compared with Real and Motor Imagery conditions, which already have proved to induce bimanual coupling. We showed that the ovalization of a perceived circle over a line drawing during PI was comparable to that observed in Real and Motor Imagery condition. This finding indicates that PI can induce bimanual coupling, and proprioceptive information can influence the motor programs of the contralateral hand.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e350db44ed3326fd1aa5cae03275e1ebTest
https://doaj.org/article/7ed01d92a258464aba9aa91a827d16efTest

6

Effects of visual-motor illusion on functional connectivity during motor imagery

المؤلفون: Hiroyo Kamio, Junpei Tanabe, Keisuke Goto, Kazu Amimoto, Yumi Ikeda, Ken Kumai, Katsuya Sakai

المصدر: Experimental Brain Research. 239:2261-2271

الوصف: This study aimed to verify whether visual-motor illusion changes the functional connectivity during kinesthetic motor imagery and the vividness of kinesthetic motor imagery. Twelve right-handed healthy adults participated in this study. All participants randomly performed both the illusion and observation conditions in 20 min, respectively. Illusion condition was induced kinesthetic illusion by viewing own finger movement video. Observation condition was observed own finger movement video. Before and after each condition, the brain activity of kinesthetic motor imagery was measured using functional near-infrared spectroscopy. The measure of brain activity under kinesthetic motor imagery was executed in five sets using block design. Under the kinesthetic motor imagery, participants were asked to imagine the movement of their right finger. Functional connectivity was analyzed during the kinesthetic motor imagery. In addition, after performing the task under kinesthetic motor imagery, the vividness of the kinesthetic motor imagery was measured using a visual analog scale. Furthermore, after each condition, the degree of kinesthetic illusion and sense of body ownership measured based on a seven-point Likert scale. Our results indicated that the functional connectivity during kinesthetic motor imagery was changed in the frontal-parietal network of the right hemisphere. The vividness of the kinesthetic motor imagery was significantly higher with the illusion condition compared with the observation condition. The degree of kinesthetic illusion and sense of body ownership were significantly higher with the illusion condition compared with the observation condition. In conclusion, the visual-motor illusion changes the functional connectivity during kinesthetic motor imagery and influences the vividness of kinesthetic motor imagery. The visual-motor illusion provides evidence that it improves motor imagery ability. VMI may be used in patients with impaired motor imagery.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::85b01f01febd2f71f2787960abc24df9Test
https://doi.org/10.1007/s00221-021-06136-2Test

7

Frontal brain areas are more involved during motor imagery than during motor execution/preparation of a response sequence

المؤلفون: Jagna Sobierajewicz, Anna Przekoracka-Krawczyk, Willem B. Verwey, Robert Henricus Johannes van der Lubbe, Marijtje L.A. Jongsma

المساهمون: Digital Society Institute

المصدر: International journal of psychophysiology, 164, 71-86. Elsevier
International Journal of Psychophysiology, 164, 71-86
International Journal of Psychophysiology, 164, pp. 71-86

الوصف: Contains fulltext : 231382.pdf (Publisher’s version ) (Open Access) Results of several neuroimaging studies support the functional equivalence model, which states that motor imagery (MI) and motor execution (ME) involve the same processes, except for the final execution component. In contrast, the motor-cognitive model implies that MI additionally involves frontal executive control processes. However, according to some authors MI may actually be more comparable to motor preparation (MP). In the current electroencephalographic study, a version of the discrete sequence production paradigm was employed in which human participants initially had to prepare a sequence of five finger movements that subsequently had to be executed, imagined, or withheld. MI, ME, and MP were compared by computing event-related (de)-synchronization in the theta, alpha/mu, and beta bands. Results revealed a major increase in frontal theta power during MI as compared to ME and MP. At the end of the examined intervals, a posterior reduction in alpha power was present during ME and MP, but not during MI. Finally, above sensorimotor areas a decrease in beta power was observed that was most pronounced in the case of ME. The increase of frontal theta activity during MI may reflect increased effort, while the absence of a reduction in posterior alpha power suggests no major involvement of visuospatial attention and/or visual imagery. The present findings favor the motor-cognitive model, as it predicts extra involvement of frontal executive processes during MI. 16 p.

وصف الملف: application/pdf

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2fd3dd8c778e76f8492a4d1980223b8fTest
http://www.scopus.com/inward/record.url?scp=85102481749&partnerID=8YFLogxKTest

8

Neurophysiological markers discriminate different forms of motor imagery during action observation

المؤلفون: Adam M. Bruton, Zoë C. Franklin, David J. Wright, Paul S. Holmes, Daniel Eaves

المصدر: Cortex. 124:119-136

مصطلحات موضوعية: Movement, Cognitive Neuroscience, medicine.medical_treatment, Pyramidal Tracts, Experimental and Cognitive Psychology, 050105 experimental psychology, dual-action simulation, 03 medical and health sciences, 0302 clinical medicine, Motor imagery, motor imagery during action observation, transcranial magnetic stimulation, medicine, Humans, 0501 psychology and cognitive sciences, Evoked potential, Muscle, Skeletal, eye-tracking, Electromyography, Simulation hypothesis, 05 social sciences, Motor Cortex, Eye movement, Cognition, Index finger, Evoked Potentials, Motor, Hand, Transcranial Magnetic Stimulation, body regions, Transcranial magnetic stimulation, Neuropsychology and Physiological Psychology, medicine.anatomical_structure, Imagination, Eye tracking, Psychology, Neuroscience, 030217 neurology & neurosurgery

الوصف: Open practices: The study in this article earned an Open Materials badge for transparent practices. Materials and data for the study are available at https://e-space.mmu.ac.uk/id/eprint/624008Test. Copyright © 2019 The Authors. The dual-action simulation hypothesis proposes that both an observed and an imagined action can be represented simultaneously in the observer's brain. These two sensorimotor streams would either merge or compete depending on their relative suitability for action planning. To test this hypothesis, three forms of combined action observation and motor imagery (AO + MI) instructions were used in this repeated-measures experiment. Participants observed index finger abduction-adduction movements while imagining the same action (congruent AO + MI), little finger abduction-adduction (coordinative AO + MI), or a static hand (conflicting AO + MI). Single-pulse transcranial magnetic stimulation was applied to the left primary motor cortex. The amplitude of motor evoked potential responses were recorded from both the first dorsal interosseous (FDI) and abductor digiti minimi (ADM) muscles of the right-hand while eye movements were tracked. When controlling for the influence of relevant eye movements, corticospinal excitability was facilitated relative to control conditions in the concurrently observed and imagined muscles for both congruent and coordinative AO + MI conditions. Eye-movement metrics and social validation data from post–experiment interviews provided insight into the attentional and cognitive mechanisms underlying these effects. The findings provide empirical support for the dual-action simulation hypothesis, indicating for the first time that it is possible to co-represent observed and imagined actions simultaneously.

وصف الملف: text; Print-Electronic

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02e879c52d696eb66da53535f59cfc7cTest
https://doi.org/10.1016/j.cortex.2019.10.016Test

9

Effect of Neurofeedback Facilitation on Poststroke Gait and Balance Recovery

المؤلفون: Kuni Konaka, Hiroaki Fujimoto, Ichiro Miyai, Yuichi Hiramatsu, Yoshihide Sunada, Hironori Otomune, Noriaki Hattori, Yuta Kajiyama, Hideki Mochizuki, Masahito Mihara, Yoshiyuki Watanabe

المصدر: Neurology. 96:e2587-e2598

مصطلحات موضوعية: Adult, Male, medicine.medical_specialty, 050105 experimental psychology, law.invention, 03 medical and health sciences, 0302 clinical medicine, Physical medicine and rehabilitation, Motor imagery, Double-Blind Method, Randomized controlled trial, law, medicine, Humans, 0501 psychology and cognitive sciences, Gait, Postural Balance, Gait Disorders, Neurologic, Aged, Balance (ability), Spectroscopy, Near-Infrared, Supplementary motor area, Gait Disturbance, business.industry, 05 social sciences, Motor Cortex, Stroke Rehabilitation, Recovery of Function, Middle Aged, Neurofeedback, SMA, medicine.anatomical_structure, Imagination, Female, Neurology (clinical), business, 030217 neurology & neurosurgery

الوصف: ObjectiveTo test the hypothesis that supplementary motor area (SMA) facilitation with functional near-infrared spectroscopy–mediated neurofeedback (fNIRS-NFB) augments poststroke gait and balance recovery, we conducted a 2-center, double-blind, randomized controlled trial involving 54 Japanese patients using the 3-meter Timed Up and Go (TUG) test.MethodsPatients with subcortical stroke-induced mild to moderate gait disturbance more than 12 weeks from onset underwent 6 sessions of SMA neurofeedback facilitation during gait- and balance-related motor imagery using fNIRS-NFB. Participants were randomly allocated to intervention (28 patients) or placebo (sham: 26 patients). In the intervention group, the fNIRS signal contained participants' cortical activation information. The primary outcome was TUG improvement 4 weeks postintervention.ResultsThe intervention group showed greater improvement in the TUG test (12.84 ± 15.07 seconds, 95% confidence interval 7.00–18.68) than the sham group (5.51 ± 7.64 seconds, 95% confidence interval 2.43–8.60; group difference 7.33 seconds, 95% CI 0.83–13.83; p = 0.028), even after adjusting for covariates (group × time interaction; F1.23,61.69 = 4.50, p = 0.030, partial η2 = 0.083). Only the intervention group showed significantly increased imagery-related SMA activation and enhancement of resting-state connectivity between SMA and ventrolateral premotor area. Adverse effects associated with fNIRS-mediated neurofeedback intervention were absent.ConclusionSMA facilitation during motor imagery using fNIRS neurofeedback may augment poststroke gait and balance recovery by modulating the SMA and its related network.Classification of EvidenceThis study provides Class III evidence that for patients with gait disturbance from subcortical stroke, SMA neurofeedback facilitation improves TUG time (UMIN000010723 at UMIN-CTR; umin.ac.jp/english/).

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb8d7ff361c237302a2ddfc2f2ce3642Test
https://doi.org/10.1212/wnl.0000000000011989Test

10

Hybrid classification model for eye state detection using electroencephalogram signals

المؤلفون: Shwet Ketu, Pramod Kumar Mishra

المصدر: Cogn Neurodyn

الوصف: The electroencephalography (EEG) signal is an essential source of Brain–Computer Interface (BCI) technology implementation. The BCI is nothing but a non-muscle communication medium among the external devices and the brain. The basic concept of BCI is to enable the interaction among the neurological ill patients to others with the help of brain signals. EEG signal classification is an essential requirement for various applications such as motor imagery classification, drug effects diagnosis, emotion classification, seizure prediction/detection, eye state prediction/detection, and so on. Thus, there is a need for an efficient classification model that can deal with the EEG datasets more adequately with better classification accuracy, which will further help in developing the automatic solution for the medical domain. In this paper, we have introduced a hybrid classification model for eye state detection using electroencephalogram (EEG) signals. This hybrid classification model has been evaluated with the other traditional machine learning models, eight classification models (Prepossessed + Hypertuned) and six state-of-the-art methods to assess its appropriateness and correctness. This proposed classification model establishes a machine learning-based hybrid model for the classification of eye state using EEG signals with greater exactness. It is also capable of solving the issue of outlier detection and removal to address the class imbalance problem, which will offer the solution toward building the robotic or smart machine-based solution for social well-being.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4eb762740c99b0a5e27f2298bddedd4bTest
https://doi.org/10.1007/s11571-021-09678-xTest

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