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Model neocortical microcircuit supports beta and gamma rhythms
2021 10th International IEEE/EMBS Conference on Neural Engineering (NER), 2021Gamma and beta rhythms in neocortical circuits are thought to be caused by distinct subcircuits involving different type of interneurons. However, it is not clear how these distinct but inter-linked intrinsic circuits interact with afferent drive to engender the two rhythms. We report a biophysical computational model to investigate the hypothesis that
Feng Feng +2 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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Investigating the Role of Alpha and Beta Rhythms in Functional Motor Networks
Neuroscience, 2018It is recognized that lower electroencephalography (EEG) frequencies correspond to distributed brain activity over larger spatial regions than higher frequencies and are associated with coordination. In motor processes it has been suggested that this is not always the case. Our objective was to explore this contradiction.
Alkinoos, Athanasiou +5 more
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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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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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Diurnal rhythm of beta-endorphin in neonates.
Developmental pharmacology and therapeutics, 1989In an attempt to prove whether beta-endorphin diurnal rhythm existed in neonates, 17 infants with a mean (+/- SD) gestational age of 31.7 +/- 4.8 weeks and a birth weight of 1,790 +/- 898 g were studied at a mean postnatal age of 3.3 +/- 0.5 days. Plasma samples were obtained from a pre-existing umbilical arterial line at 09.00 h, noon and 15.00 h ...
K, Sankaran, W, Hindmarsh, L, Tan
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