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- W2023222495 abstract "Blocking or desynchronization of the central beta rhythm prior to and parallel to voluntary movement was found in 31 of 33 normal subjects investigated. The beta blocking was short lasting (1–3 sec), very often accompanied by blocking of the mu rhythm and localized in the central region. Phasic beta desynchronization was also observed after somatosensory stimulation. The beta rhythm showed a bilateral symmetrical blocking pattern with unilateral movement or stimulation. Patients with unilateral cerebral ischaemia showed an asymmetric blocking response and therefore demonstrated a high degree of hemispheric independence of the rhythmic generating systems. Central beta desynchronization is, therefore, a normal physiological phenomenon caused by activation processes of the sensorimotor cortex and detectable on the scalp very easily with closely spaced electrodes. Un blocage ou une désynchronisation du rhythmes bêta central précédant et accompagnant un mouvement volontaire a été identifié chez 31 des 33 sujets normaux que nous avons étudiés. Le blocage bêta était de courte durée (1–3 sec) très souvent accompagné par le blocage du rythme mu, et localisé dans la région centrale. La désynchronisation bêta phasique fut également observée après stimulation somatosensorielle. Le rythme bêta a montré un blocage symétrique bilatéral, lors d'une stimulation ou d'un mouvement unilatéral. Des patients souffrant d'une ischémie cérébrale unilatérale ont présenté une réponse de blocage asymétrique et, par conséquent, un degré élevé d'indépendance hémisphérique des systémes générateurs du rythme. La désynchronisation du rythme bêta central est donc un phénomène physiologique normal causé par des processus d'activation du cortex sensorimoteur et très facilement détectable sur le scalp avec des électrodes peu espacées." @default.
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- W2023222495 date "1981-03-01" @default.
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- W2023222495 title "Central beta rhythm during sensorimotor activities in man" @default.
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- W2023222495 doi "https://doi.org/10.1016/0013-4694(81)90139-5" @default.
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