Case report: Exploring cortico-muscular coherence during Mirror visual feedback for deafferentation pain: a proof-of-concept study

Frontiers in Human Neuroscience, Journal Year: 2025, Volume and Issue: 19

Published: Feb. 24, 2025

Mirror visual feedback (MVF) has shown promise as a treatment for deafferentation pain following brachial plexus injury, yet the underlying mechanisms remain unclear. This study aimed to assess MVF's effect on two patients with by analyzing cortico-muscular coherence (CMC), measure of functional connectivity between brain and muscles. Two injuries performed wrist movements without mirror, accompanied electromyography (EMG) electroencephalography (EEG). CMC was calculated during each condition determine changes in sensorimotor network. In Patient 1, increased beta band extensor carpi radialis surrounding parietal regions mirror condition. 2, beta-band decreased compensatory muscle (biceps brachii) but primary (flexor ulnaris) when used. These findings suggest MVF promotes integration, reducing intensity. effectively enhances contralateral cortex frequency band, relief affected limb. suggests that analysis could refine rehabilitation using MVF, providing better understanding its neural optimizing therapeutic outcomes. Our underscores potential valuable biomarker monitoring tailoring interventions.

Language: Английский

Beta-band cortico-muscular phase coherence in hemiparetic stroke

Biomedical Signal Processing and Control, Journal Year: 2024, Volume and Issue: 97, P. 106719 - 106719

Published: Aug. 7, 2024

Following a stroke, compensation for the loss of ipsilesional corticospinal and corticobulbar projections, results in increased reliance on contralesional motor pathways during paretic arm movement. Better understanding outcomes post-stroke cortical adaptation may benefit more targeted rehabilitation interventions. This proof-of-concept study involves eight healthy controls ten participants. Electroencephalographic (EEG) deltoid electromyographic (EMG) data were collected an upper-limb task. Phase coupling between beta-band cortex EEG EMG was assessed using Multi-Phase Locking Value (M-PLV) method. Different from classic cortico-muscular coherence, M-PLV allows calculation dynamic phase coherence delays, is not affected by non-stationary nature EEG/EMG signals. Nerve conduction delay contralateral to muscle estimated. Our show ipsilateral (contralesional) behavior altered stroke participants, with significant differences EEG-EMG values, time course percentage above significance threshold, area threshold. analysis provides evidence adaptation, highlighting its role shoulder abduction cortices significantly higher Beta-band shows greater phase-coherence distribution convergence (ipsilesional) which interpretable as maladaptive neural resulting cortices.

Language: Английский

Corticomuscular Coherence as Neurorehabilitation Assessment

IntechOpen eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 30, 2024

Corticomuscular coherence (CMC) is the correlation between electroencephalography (EEG), magnetoencephalography (MEG), and electromyography (EMG) a neurophysiological indicator that reflects functional connectivity brain muscle. This includes both descending (such as motor commands) ascending sensory inputs) information transmission. Therefore, relationship control CMC changes in due to learning were examined. During neurorehabilitation, interventions often aim promote acquire control, making useful tool neurorehabilitation. review provides an overview of based on basic applied clinical research, facilitating its use assessment method for

Language: Английский