Results 261 to 270 of about 89,617 (292)
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Modeling and Analysis of Beta Oscillations in the Basal Ganglia
IEEE Transactions on Neural Networks and Learning Systems, 2018Enhanced beta (12-30 Hz) oscillatory activity in the basal ganglia (BG) is a prominent feature of the Parkinsonian state in animal models and in patients with Parkinson's disease. Increased beta oscillations are associated with severe dopaminergic striatal depletion. However, the mechanisms underlying these pathological beta oscillations remain elusive.
Chen Liu 0003 +4 more
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2010
AbstractNeuromodulatory substances evoke beta2 oscillations in motor and secondary somatosensory cortex, that depend on gap junctions. In the latter case, the oscillations are only weakly dependent on synaptic transmission. Beta2 is most prominent in intrinsically bursting layer 5 pyramidal cells (some of which are expected to contribute to the ...
Roger D. Roger, Miles A. Whittington
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AbstractNeuromodulatory substances evoke beta2 oscillations in motor and secondary somatosensory cortex, that depend on gap junctions. In the latter case, the oscillations are only weakly dependent on synaptic transmission. Beta2 is most prominent in intrinsically bursting layer 5 pyramidal cells (some of which are expected to contribute to the ...
Roger D. Roger, Miles A. Whittington
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Closing the loop of DBS using the beta oscillations in cortex
Cognitive Neurodynamics, 2021Cortical information has great importance to reflect the deep brain stimulation (DBS) effects for Parkinson's disease patients. Using cortical activities to feedback is an available closed-loop idea for DBS. Previous studies have demonstrated the pathological beta (12-35 Hz) cortical oscillations can be suppressed by appropriate DBS settings.
Chen, Liu +10 more
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Metabolic Oscillations in β-Cells
Diabetes, 2002Whereas the mechanisms underlying oscillatory insulin secretion remain unknown, several models have been advanced to explain if they involve generation of metabolic oscillations in β-cells. Evidence, including measurements of oxygen consumption, glucose consumption, NADH, and ATP/ADP ratio, has accumulated to support the hypothesis that energy ...
Robert T, Kennedy +3 more
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The onset mechanism of Parkinson’s beta oscillations: A theoretical analysis
Journal of Theoretical Biology, 2019In this paper, we build a basal ganglia-cortex-thalamus model to study the oscillatory mechanisms and boundary conditions of the beta frequency band (13-30 Hz) that appears in the subthalamic nucleus. First, a theoretical oscillatory boundary formula is obtained in a simplified model by using the Laplace transform and linearization process of the ...
Hu, Bing +6 more
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A model description of beta oscillations in the external globus pallidus
Cognitive Neurodynamics, 2022The external globus pallidus (GPe), a subcortical nucleus located in the indirect pathway of the basal ganglia, is widely considered to have tight associations with abnormal beta oscillations (13-30 Hz) observed in Parkinson's disease (PD). Despite that many mechanisms have been put forward to explain the emergence of these beta oscillations, however ...
Mingming Chen +7 more
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A model of the quasi-biennial oscillation on an equatorial beta-plane
Quarterly Journal of the Royal Meteorological Society, 1982AbstractAn equatorial beta‐plane model of equatorial wave‐mean flow interaction in the lower stratosphere is described. Kelvin and mixed Rossby‐gravity waves generated by a specified forcing on the lower boundary radiate upward through the model domain where they are subject to thermal and mechanical dissipation.
R. Alan Plumb, Robert C. Bell
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Oscillating Solutions of the Falkner–Skan Equation for Negative $\beta $
SIAM Journal on Mathematical Analysis, 1987The well known Falkner-Skan equation is studied, when the coefficient of the term which contains the first derivative \(\beta\) is negative. For \(\beta
Hastings, S. P., Troy, W. C.
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Post-movement beta oscillations studied with linear estimation
Electroencephalography and Clinical Neurophysiology, 1998The application of surface laplacian and linear estimation methods to single trial EEG data was studied. EEG was recorded in 3 subjects during voluntary, self-paced extensions and flexions of the index finger. In each subject a post-movement beta synchronisation was found in specific frequency bands.
van Burik, M.J. +6 more
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Gamma/beta oscillation and sensory gating deficit in schizophrenia
NeuroReport, 2004Sensory gating can be measured by the suppression of auditory evoked potentials in a paired-click paradigm. The normal gating of the P50 response to the second stimulus (S2) is impaired in many schizophrenic patients. Various in vitro and in vivo evoked potential paradigms have shown that a stimulus evokes early gamma frequency oscillation, which is ...
L Elliot, Hong +4 more
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