Mu rhythm: state of the art with special focus on cerebral palsy

Publication date: Available online 9 July 2019Source: Annals of Physical and Rehabilitation MedicineAuthor(s): Josselin Démas, Mathieu Bourguignon, Maximilien Périvier, Xavier De Tiège, Mickael Dinomais, Patrick Van BogaertAbstractVarious 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 remain...
Source: Annals of Physical and Rehabilitation Medicine - Category: Rehabilitation Source Type: research