نتایج جستجو برای: beta band

تعداد نتایج: 318699  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شاهد - دانشکده مهندسی برق و الکترونیک 1392

حلقه های قفل شده فاز تمام دیجیتال یکی از مباحث مهم در دنیای امروز الکترونیک هستند. حلقه قفل فازهای (pll ) که به وسیله روشهای آنالوگ طراحی می شدند نسبت به تغییرات دما و ولتاژ و پروسس حساس بودند. این امر موجب سختی طراحی و نیازمندی به طراحی مجدد در تکنولوژی های جدید می شود. این در حالی است که با استفاده از حلقه های قفل فاز تمام دیجیتال این مشکلات برطرف میشوند. حلقه های قفل فاز تمام دیجیتال (adpll...

Journal: :Blood 1996
A C Rybicki R S Schwartz E J Hustedt C E Cobb

Band 3 (anion-exchange protein 1-[AE1]) is the major integral membrane protein of human erythrocytes and links the membrane to the underlying cytoskeleton via high-affinity binding to ankyrin. It is unclear whether other cytoskeletal proteins participate in strengthening the ankyrin-band 3 linkage, but a putative role for protein 4.2 (P4.2) has been proposed based on the increased osmotic fragi...

Journal: :Cerebral cortex 2009
Simon Hanslmayr Bernhard Spitzer Karl-Heinz Bäuml

Prior studies, mostly using intentional learning, suggest that power increases in theta and gamma oscillations and power decreases in alpha and beta oscillations are positively related to later remembering. Using incidental learning, this study investigated whether these brain oscillatory subsequent memory effects can be differentiated by encoding task. One group of subjects studied material pe...

Journal: :Clinical chemistry 1981
A O Vladutiu J S Kim

Agarose-gel electrophoresis of serum of a 72-year-old woman with liver cirrhosis showed virtually no beta-globulins two weeks before the patient's death. There was marked decrease in the concentrations of transferrin, beta-lipoproteins, hemopexin, complement component C3, beta-glycoprotein I, and cholesterol in serum. Absence of a beta-globulin band appears to signify an ominous prognosis.

2014
John-Stuart Brittain Andrew Sharott Peter Brown

Oscillatory activity in the beta (13-30 Hz) frequency band is widespread in cortico-basal ganglia circuits, and becomes prominent in Parkinson's disease (PD). Here we develop the hypothesis that the degree of synchronization in this frequency band is a critical factor in gating computation across a population of neurons, with increases in beta band synchrony entailing a loss of information-codi...

2013
Prejaas Tewarie Menno M. Schoonheim Cornelis J. Stam Marieke L. van der Meer Bob W. van Dijk Frederik Barkhof Chris H. Polman Arjan Hillebrand

The relation between pathological findings and clinical and cognitive decline in Multiple Sclerosis remains unclear. Here, we tested the hypothesis that altered functional connectivity could provide a missing link between structural findings, such as thalamic atrophy and white matter lesion load, and clinical and cognitive dysfunction. Resting-state magnetoencephalography recordings from 21 MS ...

Journal: :Circulation research 1986
R D Feldman C Y Lai

Desensitization of the leukocyte beta-receptor system has been associated with a functional uncoupling of the components of the beta-receptor complex. In order to determine whether desensitization and uncoupling of the leukocyte beta-receptor is associated with any structural alterations in the beta-receptor, we studied labeling of lymphocytes using the photoactive beta-adrenergic antagonist p-...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2017
Saskia Haegens José Vergara Román Rossi-Pool Luis Lemus Ranulfo Romo

Previous work on perceptual decision making in the sensorimotor system has shown population dynamics in the beta band, corresponding to the encoding of stimulus properties and the final decision outcome. Here, we asked how oscillatory dynamics in the medial premotor cortex (MPC) contribute to supramodal perceptual decision making. We recorded local field potentials (LFPs) and spikes in two monk...

2010
Ronald B Willemse Jan C de Munck Jeroen P.A Verbunt Dennis van ’t Ent Peterjan Ris Johannes C Baayen Cornelis J Stam W. Peter Vandertop

To study the topographical organization of mu and beta band event-related desynchronization (ERD) associated with voluntary hand and foot movements, we used magnetoencephalographic (MEG) recordings from 19 patients with perirolandic lesions. Synthetic aperture magnetometry (SAM) was used to detect and localize changes in the mu (7 - 11 Hz) and beta (13 - 30 Hz) frequency bands associated with r...

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