Realistic visual feedback enhances event-related desynchronization during feedback-regulated hand motor imagery

2011 ◽  
Vol 71 ◽  
pp. e202
Author(s):  
Junichi Ushiba ◽  
Shotaro Miyashita ◽  
Hiroharu Aono ◽  
Mitsuhiko Kodama ◽  
Akio Kimura ◽  
...  
Keyword(s):  
Motor Imagery ◽  
Visual Feedback ◽  
Event Related Desynchronization

scholarly journals Event-related desynchronization in motor imagery with EEG neurofeedback in the context of declarative interference and sleep

2021 ◽  
Vol 1 (4) ◽  
pp. 100058
Author(s):  
Mareike Daeglau ◽  
Catharina Zich ◽  
Julius Welzel ◽  
Samira Kristina Saak ◽  
Jannik Florian Scheffels ◽  
...  
Keyword(s):  
Motor Imagery ◽  
Event Related Desynchronization ◽  
Eeg Neurofeedback

scholarly journals Effects of camera-based mirror visual feedback therapy for patients who had a stroke and the neural mechanisms involved: protocol of a multicentre randomised control study

BMJ Open ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. e022828 ◽  
Author(s):  
Li Ding ◽  
Xu Wang ◽  
Xiaoli Guo ◽  
Shugeng Chen ◽  
Hewei Wang ◽  
...  
Keyword(s):  
Motor Imagery ◽  
Visual Feedback ◽  
Visual Stimulation ◽  
Controlled Trial ◽  
Intervention Group ◽  
Functional Independence ◽  
Neural Mechanisms ◽  
Feedback Intervention ◽  
Mirror Visual Feedback ◽  
Hand Laterality

IntroductionAs a combination of visual stimulation and motor imagery, mirror visual feedback (MVF) is an effective treatment for motor impairment after stroke; however, few studies have investigated its effects on relevant cognitive processes such as visual perception and motor imagery. Camera-based MVF (camMVF) overcomes the intrinsic limitations of real mirrors and is recognised as an optimal setup. This study aims to investigate the effects of camMVF as an adjunct treatment for stroke patients, compare camMVF outcomes with those of conventional therapy and elucidate neural mechanisms through which MVF influences cognition and brain networks.Methods and analysisThis will be a multicentre, single-blinded, randomised controlled trial including 90 patients randomised into three groups: camera-based mirror visual feedback intervention group (30), shielded mirror visual feedback intervention group (30) and conventional group (30). Patients in each group will receive a 60 min intervention 5 days per week over 4 weeks. The primary outcome will be the Fugl-Meyer Assessment Upper Limb subscale measurement. Secondary outcomes include the modified Ashworth Scale, Grip Strength test, Modified Barthel Index, Functional Independence Measure, Berg Balance Scale, 10-metre walking test, hand-laterality task and electroencephalography .Ethics and disseminationEthics approval was granted by the Huashan Hospital Institutional Review Board on 15 March (KY2017-230). We plan to submit the results to a peer-reviewed journal and present them at conferences, rehabilitation forums and to the general public.Trial registration numberChiCTR-INR-17013644; Pre-results.

Effectiveness of mirror therapy, motor imagery, and virtual feedback on phantom limb pain following amputation: A systematic review

2017 ◽  
Vol 42 (3) ◽  
pp. 288-298 ◽  
Author(s):  
Laura Herrador Colmenero ◽  
Jose Manuel Perez Marmol ◽  
Celia Martí-García ◽  
María de los Ángeles Querol Zaldivar ◽  
Rosa María Tapia Haro ◽  
...  
Keyword(s):  
Systematic Review ◽  
Motor Imagery ◽  
Visual Feedback ◽  
Methodological Quality ◽  
Internal Validity ◽  
Phantom Limb Pain ◽  
Research Quality ◽  
Phantom Limb ◽  
Mirror Therapy ◽  
Limb Pain

Background: Phantom limb pain is reported in 50%–85% of people with amputation. Clinical interventions in treating central pain, such as mirror therapy, motor imagery, or virtual visual feedback, could redound in benefits to amputee patients with phantom limb pain. Objectives: To provide an overview of the effectiveness of different techniques for treating phantom limb pain in amputee patients. Study design: Systematic review. Methods: A computerized literature search up to April 2017 was performed using the following databases: PubMed, Scopus, CINAHL, MEDLINE, ProQuest, PEDro, EBSCOhost, and Cochrane Plus. Methodological quality and internal validity score of each study were assessed using PEDro scale. For data synthesis, qualitative methods from the Cochrane Back Review Group were applied. Results: In all, 12 studies met our inclusion criteria, where 9 were rated as low methodological quality and 3 rated moderate quality. All studies showed a significant reduction in pain, but there was heterogeneity among subjects and methodologies and any high-quality clinical trial (PEDro score ≤8; internal validity score ≤5) was not found. Conclusion: Mirror therapy, motor imaginary, and virtual visual feedback reduce phantom limb pain; however, there is limited scientific evidence supporting their effectiveness. Future studies should include designs with more solid research methods, exploring short- and long-term benefits of these therapies. Clinical relevance This systematic review investigates the effectiveness of mirror therapy, motor imagery, and virtual visual feedback on phantom limb pain, summarizing the currently published trials and evaluating the research quality. Although these interventions have positive benefits in phantom limb pain, there is still a lack of evidence for supporting their effectiveness.

Event-related desynchronization reflects downregulation of intracortical inhibition in human primary motor cortex

2013 ◽  
Vol 110 (5) ◽  
pp. 1158-1166 ◽  
Author(s):  
Mitsuaki Takemi ◽  
Yoshihisa Masakado ◽  
Meigen Liu ◽  
Junichi Ushiba
Keyword(s):  
Motor Cortex ◽  
Motor Imagery ◽  
Sensorimotor Cortex ◽  
Primary Motor Cortex ◽  
Motor Evoked Potentials ◽  
Short Interval ◽  
Hand Movement ◽  
Intracortical Inhibition ◽  
Imagery Task ◽  
Event Related Desynchronization

There is increasing interest in electroencephalogram (EEG)-based brain-computer interface (BCI) as a tool for rehabilitation of upper limb motor functions in hemiplegic stroke patients. This type of BCI often exploits mu and beta oscillations in EEG recorded over the sensorimotor areas, and their event-related desynchronization (ERD) following motor imagery is believed to represent increased sensorimotor cortex excitability. However, it remains unclear whether the sensorimotor cortex excitability is actually correlated with ERD. Thus we assessed the association of ERD with primary motor cortex (M1) excitability during motor imagery of right wrist movement. M1 excitability was tested by motor evoked potentials (MEPs), short-interval intracortical inhibition (SICI), and intracortical facilitation (ICF) with transcranial magnetic stimulation (TMS). Twenty healthy participants were recruited. The participants performed 7 s of rest followed by 5 s of motor imagery and received online visual feedback of the ERD magnitude of the contralateral hand M1 while performing the motor imagery task. TMS was applied to the right hand M1 when ERD exceeded predetermined thresholds during motor imagery. MEP amplitudes, SICI, and ICF were recorded from the agonist muscle of the imagined hand movement. Results showed that the large ERD during wrist motor imagery was associated with significantly increased MEP amplitudes and reduced SICI but no significant changes in ICF. Thus ERD magnitude during wrist motor imagery represents M1 excitability. This study provides electrophysiological evidence that a motor imagery task involving ERD may induce changes in corticospinal excitability similar to changes accompanying actual movements.

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