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Mu rhythm : State of the art with special focus on cerebral palsy / Josselin Démas in Annals of physical and rehabilitation medicine, Vol. 63, n°5 (Octobre 2020)
[article]
Titre : Mu rhythm : State of the art with special focus on cerebral palsy Type de document : texte imprimé Auteurs : Josselin Démas ; Mathieu Bourguignon ; Maximilien Périvier ; Xavier De Tiège ; Mickael Dinomais ; Patrick Van Bogaert Année de publication : 2020 Article en page(s) : p. 439-446 Note générale : doi.org/10.1016/j.rehab.2019.06.007 Langues : Anglais (eng) Mots-clés : Cerebral palsy Magnetoencephalography Electroencephalography Mu rhythm Rehabilitation Plasticity Résumé : Various specific early rehabilitation strategies are proposed to decrease functional disabilities in patients with cerebral palsy (CP). These strategies are thought to favour the mechanisms of brain plasticity that take place after brain injury. However, the level of evidence is low. Markers of brain plasticity would favour validation of these rehabilitation programs. In this paper, we consider the study of mu rhythm for this goal by describing the characteristics of mu rhythm in adults and children with typical development, then review the current literature on mu rhythm in CP. Mu rhythm is composed of brain oscillations recorded by electroencephalography (EEG) or magnetoencephalography (MEG) over the sensorimotor areas. The oscillations are characterized by their frequency, topography and modulation. Frequency ranges within the alpha band (∼10 Hz, mu alpha) or beta band (∼20 Hz, mu beta). Source location analyses suggest that mu alpha reflects somatosensory functions, whereas mu beta reflects motor functions. Event-related desynchronisation (ERD) followed by event-related (re-)synchronisation (ERS) of mu rhythm occur in association with a movement or somatosensory input. Even if the functional role of the different mu rhythm components remains incompletely understood, their maturational trajectory is well described. Increasing age from infancy to adolescence is associated with increasing ERD as well as increasing ERS. A few studies characterised mu rhythm in adolescents with spastic CP and showed atypical patterns of modulation in most of them. The most frequent findings in patients with unilateral CP are decreased ERD and decreased ERS over the central electrodes, but atypical topography may also be found. The patterns of modulations are more variable in bilateral CP. Data in infants and young children with CP are lacking and studies did not address the questions of intra-individual reliability of mu rhythm modulations in patients with CP nor their modification after motor learning. Better characterization of mu rhythm in CP, especially in infants and young children, is warranted before considering this rhythm as a potential neurophysiological marker of brain plasticity. Permalink : ./index.php?lvl=notice_display&id=91318
in Annals of physical and rehabilitation medicine > Vol. 63, n°5 (Octobre 2020) . - p. 439-446[article] Mu rhythm : State of the art with special focus on cerebral palsy [texte imprimé] / Josselin Démas ; Mathieu Bourguignon ; Maximilien Périvier ; Xavier De Tiège ; Mickael Dinomais ; Patrick Van Bogaert . - 2020 . - p. 439-446.
doi.org/10.1016/j.rehab.2019.06.007
Langues : Anglais (eng)
in Annals of physical and rehabilitation medicine > Vol. 63, n°5 (Octobre 2020) . - p. 439-446
Mots-clés : Cerebral palsy Magnetoencephalography Electroencephalography Mu rhythm Rehabilitation Plasticity Résumé : Various specific early rehabilitation strategies are proposed to decrease functional disabilities in patients with cerebral palsy (CP). These strategies are thought to favour the mechanisms of brain plasticity that take place after brain injury. However, the level of evidence is low. Markers of brain plasticity would favour validation of these rehabilitation programs. In this paper, we consider the study of mu rhythm for this goal by describing the characteristics of mu rhythm in adults and children with typical development, then review the current literature on mu rhythm in CP. Mu rhythm is composed of brain oscillations recorded by electroencephalography (EEG) or magnetoencephalography (MEG) over the sensorimotor areas. The oscillations are characterized by their frequency, topography and modulation. Frequency ranges within the alpha band (∼10 Hz, mu alpha) or beta band (∼20 Hz, mu beta). Source location analyses suggest that mu alpha reflects somatosensory functions, whereas mu beta reflects motor functions. Event-related desynchronisation (ERD) followed by event-related (re-)synchronisation (ERS) of mu rhythm occur in association with a movement or somatosensory input. Even if the functional role of the different mu rhythm components remains incompletely understood, their maturational trajectory is well described. Increasing age from infancy to adolescence is associated with increasing ERD as well as increasing ERS. A few studies characterised mu rhythm in adolescents with spastic CP and showed atypical patterns of modulation in most of them. The most frequent findings in patients with unilateral CP are decreased ERD and decreased ERS over the central electrodes, but atypical topography may also be found. The patterns of modulations are more variable in bilateral CP. Data in infants and young children with CP are lacking and studies did not address the questions of intra-individual reliability of mu rhythm modulations in patients with CP nor their modification after motor learning. Better characterization of mu rhythm in CP, especially in infants and young children, is warranted before considering this rhythm as a potential neurophysiological marker of brain plasticity. Permalink : ./index.php?lvl=notice_display&id=91318 Exemplaires (1)
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Exclu du prêtPost-stroke hemiplegia rehabilitation: Evolution of the concepts / P. Marque in Annals of physical and rehabilitation medicine, Vol. 57, n°8 (Novembre 2014)
[article]
Titre : Post-stroke hemiplegia rehabilitation: Evolution of the concepts Titre original : Rééducation de l’hémiplégie vasculaire : évolution des concepts Type de document : texte imprimé Auteurs : P. Marque, Auteur ; David Gasq, Auteur Année de publication : 2014 Article en page(s) : p.520-529 Langues : Français (fre) Mots-clés : Stroke Rehabilitation Neuroimaging Hemiplegic Plasticity AVC Rééducation Imagerie fonctionnelle Hémiplégique Plasticité Résumé : Stroke rehabilitation has undergone a revolution over the last three decades. Cohort studies have consistently reinforced the importance of post-stroke rehabilitation to stimulate recovery, but the concepts of empirical methods originally proposed by therapists to rehabilitate these patients have not withstood clinical analysis. Functional neuroimaging and animal models have unveiled the mechanisms underlying functional recovery and helped teams understand its limitations and improvement modalities. These neuroscience discoveries constitute the grounds needed to understand the emergence of new technologies: robotics and virtual reality. The objective of this review of the literature was to select key works in this field to better understand current therapeutic possibilities.
La réadaptation des patients victimes d’AVC a connu une véritable révolution au cours des 3 dernières décennies. Les études de cohortes ont toujours souligné l’intérêt de la réadaptation après un AVC pour stimuler la récupération, mais les concepts des méthodes empiriques initialement proposées par les thérapeutes pour rééduquer ces patients n’ont pas résisté à l’analyse clinique critique. Parallèlement, les travaux de neuroimagerie fonctionnelle et les modèles animaux ont permis tout d’abord d’objectiver les mécanismes de la récupération fonctionnelle, puis d’en comprendre les limites ainsi que les modalités d’amélioration. Ces découvertes des neurosciences sont les bases sans lesquelles on ne peut pas comprendre l’apparition des nouvelles technologies : robotique et réalité virtuelle. Cette revue de la littérature se propose de faire une sélection de ces travaux clés qui permettent de mieux comprendre les propositions actuelles.Permalink : ./index.php?lvl=notice_display&id=34536
in Annals of physical and rehabilitation medicine > Vol. 57, n°8 (Novembre 2014) . - p.520-529[article] Post-stroke hemiplegia rehabilitation: Evolution of the concepts = Rééducation de l’hémiplégie vasculaire : évolution des concepts [texte imprimé] / P. Marque, Auteur ; David Gasq, Auteur . - 2014 . - p.520-529.
Langues : Français (fre)
in Annals of physical and rehabilitation medicine > Vol. 57, n°8 (Novembre 2014) . - p.520-529
Mots-clés : Stroke Rehabilitation Neuroimaging Hemiplegic Plasticity AVC Rééducation Imagerie fonctionnelle Hémiplégique Plasticité Résumé : Stroke rehabilitation has undergone a revolution over the last three decades. Cohort studies have consistently reinforced the importance of post-stroke rehabilitation to stimulate recovery, but the concepts of empirical methods originally proposed by therapists to rehabilitate these patients have not withstood clinical analysis. Functional neuroimaging and animal models have unveiled the mechanisms underlying functional recovery and helped teams understand its limitations and improvement modalities. These neuroscience discoveries constitute the grounds needed to understand the emergence of new technologies: robotics and virtual reality. The objective of this review of the literature was to select key works in this field to better understand current therapeutic possibilities.
La réadaptation des patients victimes d’AVC a connu une véritable révolution au cours des 3 dernières décennies. Les études de cohortes ont toujours souligné l’intérêt de la réadaptation après un AVC pour stimuler la récupération, mais les concepts des méthodes empiriques initialement proposées par les thérapeutes pour rééduquer ces patients n’ont pas résisté à l’analyse clinique critique. Parallèlement, les travaux de neuroimagerie fonctionnelle et les modèles animaux ont permis tout d’abord d’objectiver les mécanismes de la récupération fonctionnelle, puis d’en comprendre les limites ainsi que les modalités d’amélioration. Ces découvertes des neurosciences sont les bases sans lesquelles on ne peut pas comprendre l’apparition des nouvelles technologies : robotique et réalité virtuelle. Cette revue de la littérature se propose de faire une sélection de ces travaux clés qui permettent de mieux comprendre les propositions actuelles.Permalink : ./index.php?lvl=notice_display&id=34536 Exemplaires (1)
Cote Support Localisation Section Disponibilité Revue Revue Centre de Documentation HELHa Campus Montignies Armoires à volets Document exclu du prêt - à consulter sur place
Exclu du prêt(Re)organisation of the somatosensory system after early brain lesion : A lateralization index fMRI study / Jean-Michel Lemée in Annals of physical and rehabilitation medicine, Vol. 63, n°5 (Octobre 2020)
[article]
Titre : (Re)organisation of the somatosensory system after early brain lesion : A lateralization index fMRI study Type de document : texte imprimé Auteurs : Jean-Michel Lemée ; Eva Chinier ; Pauline Ali ; Matthieu Labriffe ; Aram Ter Minassian ; Mickael Dinomais Année de publication : 2020 Article en page(s) : p. 416-421 Note générale : doi.org/10.1016/j.rehab.2019.02.001 Langues : Anglais (eng) Mots-clés : Cerebral palsy Sensory function Plasticity Functional MRI Lateralization index Brain lesion Résumé : Objective
To evaluate the relationship between neural (re)organization of the somatosensory cortex and impairment of sensory function (2-point discrimination [2PD]) in individuals with unilateral cerebral palsy.
Methods
We included 21 individuals with unilateral cerebral palsy. 2PD thresholds were evaluated on thumb pads, and activation of the somatosensory cortex was recorded by functional MRI (fMRI) during passive movements of the affected hand. A lateralization index (LI) was calculated for the primary sensory (S1) and secondary sensory (S2) cortices and the correlation between the LI and 2PD thresholds was analysed.
Results
We found a significant negative correlation between the 2PD thresholds and the S2 LI (r = −0.5, one-tailed P-value = 0.01) and a trend towards a negative correlation with the S1 LI (r = −0.4, one-tailed P-value = 0.05).
Conclusion
High levels of activation in the contralesional hemisphere were associated with high levels of sensory impairment in individuals with unilateral cerebral palsy. The interhemispheric (re)organization of the somatosensory system may not effectively compensate for somatosensory impairment.Permalink : ./index.php?lvl=notice_display&id=91312
in Annals of physical and rehabilitation medicine > Vol. 63, n°5 (Octobre 2020) . - p. 416-421[article] (Re)organisation of the somatosensory system after early brain lesion : A lateralization index fMRI study [texte imprimé] / Jean-Michel Lemée ; Eva Chinier ; Pauline Ali ; Matthieu Labriffe ; Aram Ter Minassian ; Mickael Dinomais . - 2020 . - p. 416-421.
doi.org/10.1016/j.rehab.2019.02.001
Langues : Anglais (eng)
in Annals of physical and rehabilitation medicine > Vol. 63, n°5 (Octobre 2020) . - p. 416-421
Mots-clés : Cerebral palsy Sensory function Plasticity Functional MRI Lateralization index Brain lesion Résumé : Objective
To evaluate the relationship between neural (re)organization of the somatosensory cortex and impairment of sensory function (2-point discrimination [2PD]) in individuals with unilateral cerebral palsy.
Methods
We included 21 individuals with unilateral cerebral palsy. 2PD thresholds were evaluated on thumb pads, and activation of the somatosensory cortex was recorded by functional MRI (fMRI) during passive movements of the affected hand. A lateralization index (LI) was calculated for the primary sensory (S1) and secondary sensory (S2) cortices and the correlation between the LI and 2PD thresholds was analysed.
Results
We found a significant negative correlation between the 2PD thresholds and the S2 LI (r = −0.5, one-tailed P-value = 0.01) and a trend towards a negative correlation with the S1 LI (r = −0.4, one-tailed P-value = 0.05).
Conclusion
High levels of activation in the contralesional hemisphere were associated with high levels of sensory impairment in individuals with unilateral cerebral palsy. The interhemispheric (re)organization of the somatosensory system may not effectively compensate for somatosensory impairment.Permalink : ./index.php?lvl=notice_display&id=91312 Exemplaires (1)
Cote Support Localisation Section Disponibilité Revue Revue Centre de Documentation HELHa Campus Montignies Armoires à volets Document exclu du prêt - à consulter sur place
Exclu du prêt