Results 291 to 300 of about 181,428 (336)
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Central beta rhythm during sensorimotor activities in man
Electroencephalography and Clinical Neurophysiology, 1981Blocking 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.
G Pfurtscheller
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New Roles for the Gamma Rhythm: Population Tuning and Preprocessing for the Beta Rhythm
Journal of Computational Neuroscience, 2003Gamma (30-80 Hz) and beta (12-30 Hz) oscillations such as those displayed by in vitro hippocampal (CA1) slice preparations and by in vivo neocortical EEGs often occur successively, with a spontaneous transition between them. In the gamma rhythm, pyramidal cells fire together with the interneurons, while in the beta rhythm, pyramidal cells fire on a ...
Mette S. Olufsen +3 more
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Anatomical localization of cortical beta rhythms in cat
Neuroscience, 1987Beta electrocorticographic rhythms (40 Hz) develop during motionless focused attention in two distinct cortical foci in cats. A cytoarchitectonic study was performed to determine the precise location of these foci. Electrode tips recording beta rhythms were found: (i) in motor areas 4 gamma and 6a beta, in a band extending from the postcruciate cortex ...
J J, Bouyer +4 more
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Fast (beta) rhythms in the hippocampus: A review
Hippocampus, 1992AbstractSpontaneous or evoked brain activity in the hippocampus showed a 20–70 Hz beta rhythm under some conditions, typically during behavioral activation and accompanied by a theta rhythm. Beta rhythms are generated locally, perhaps by a recurrent feedback loop involving pyramidal cells and inhibitory interneurons. Modulation of the local circuit and
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Effect of beta-blockers on the heart rhythm complexity in children
2011 IEEE International Conference on Systems, Man, and Cybernetics, 2011Beta-blockers are often used in the treatment of various heart diseases and affect the heart rate variability. In this study we aimed to assess the effect of various types of beta-blockers on the heart rate complexity in children using the multiscale entropy and detrended fluctuation analysis (DFA).
Ahmet Ugur, Selman Nas, Volkan Tuzcu
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Theta and beta rhythm in the electroencephalograms of normal adults
Electroencephalography and Clinical Neurophysiology, 1951Abstract 1. 1. Low voltage theta activity was detected in 64 per cent of a group of 161 young normal adults and in 24 per cent of 50 mentally normal seniles, the differences between the two groups being significant at the one per cent level. This decrease of theta incidence with increasing age was discussed in relation to maturation processes ...
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Stability analysis on beta rhythm in CA1 region
International Conference on Neural Networks and Signal Processing, 2003. Proceedings of the 2003, 2003Rhythms in the gamma range and the beta range are associated with attention, perception, and cognition. Therefore, the mechanism of how long-distance synchrony between participating sites is achieved becomes one of the important issues of neuroscience.
null Dong-Uk Hwang +3 more
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Increased beta rhythm as an indicator of inhibitory mechanisms in tourette syndrome
Movement Disorders, 2015ABSTRACTBackgroundInhibitory oscillatory mechanisms subserving tic compensation have been put forward in Tourette syndrome. Modulation of the beta rhythm (15–25 Hz) as the well‐established oscillatory movement execution‐inhibition indicator was tested during a cognitive‐motor task in patients with Tourette syndrome.MethodsPerforming a Go/NoGo task, 12 ...
Niccolai, Valentina +11 more
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Effects of Handedness on Movement-Related Changes of Central Beta Rhythms
Journal of Clinical Neurophysiology, 1997The effects of handedness on the movement-related changes in beta rhythms (14-30 Hz) in the left and right perirolandic area were analyzed in 12 right-handed and 11 left-handed subjects. The motor task consisted of unilateral brisk or slow self-paced extension of the right or left index finger. The handedness effects were as follows.
A, Stancák, G, Pfurtscheller
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BETA‐RECEPTOR BLOCKADE IN MAINTENANCE OF SINUS RHYTHM OBTAINED BY ELECTROCONVERSION
Acta Medica Scandinavica, 1969Abstract. The effectiveness of beta‐receptor blockade as maintenance treatment of sinus rhythm obtained by electroconversion has been evaluated. Out of 98 consecutive patients with chronic atrial fibrillation 74 were converted and controlled at regular intervals. After three months only 27 of the 74 patients remained in sinus rhythm.
L, Hillestad, A, Andersen
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