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Literature DB >> 6268213

Interpreting power spectra from nonstationary membrane current fluctuations.

Abstract

It is often desirable to characterize membrane current fluctuations from ionic channels under conditions in which the mean current and the variance of the fluctuations change with time. A simple theory is developed that relates the power spectrum to the channel characteristics under such nonstationary conditions, assuming that the mean current time-course has been removed from the fluctuation records. Strategies for removing the mean time-course are discussed, the spectra are calculated from simulated channel fluctuations for comparison with the theory.

Mesh：

Substances：
Ion Channels

Year: 1981 PMID： 6268213 PMCID： PMC1327523 DOI： 10.1016/S0006-3495(81)84790-X

Source DB: PubMed Journal: Biophys J ISSN： 0006-3495 Impact factor: 4.033

8 in total

1. Relaxation and fluctuations of membrane currents that flow through drug-operated channels.

Authors: D Colquhoun; A G Hawkes
Journal: Proc R Soc Lond B Biol Sci Date: 1977-11-14

2. Fluctuation analysis in neurobiology.

Authors: L J DeFelice
Journal: Int Rev Neurobiol Date: 1977 Impact factor: 3.230

3. A quantitative description of end-plate currents.

Authors: K L Magleby; C F Stevens
Journal: J Physiol Date: 1972-05 Impact factor: 5.182

4. Inferences about membrane properties from electrical noise measurements.

Authors: C F Stevens
Journal: Biophys J Date: 1972-08 Impact factor: 4.033

Review 5. Conductance fluctuations and ionic pores in membranes.

Authors: E Neher; C F Stevens
Journal: Annu Rev Biophys Bioeng Date: 1977

6. Conductance fluctuations from the inactivation process of sodium channels in myelinated nerve fibres.

Authors: F Conti; B Neumcke; W Nonner; R Stämpfli
Journal: J Physiol Date: 1980-11 Impact factor: 5.182

7. Covariance of nonstationary sodium current fluctuations at the node of Ranvier.

Authors: F J Sigworth
Journal: Biophys J Date: 1981-04 Impact factor: 4.033

8. The variance of sodium current fluctuations at the node of Ranvier.

Authors: F J Sigworth
Journal: J Physiol Date: 1980-10 Impact factor: 5.182

8 in total

19 in total

1. The neuronal nicotinic alpha4beta2 receptor has a high maximal probability of being open.

Authors: Ping Li; Joe H Steinbach
Journal: Br J Pharmacol Date: 2010-08 Impact factor: 8.739

2. Estimation of ion channel kinetics from fluctuations of macroscopic currents.

Authors: Luciano Moffatt
Journal: Biophys J Date: 2007-04-06 Impact factor: 4.033

3. A multiscale investigation of repolarization variability and its role in cardiac arrhythmogenesis.

Authors: Esther Pueyo; Alberto Corrias; László Virág; Norbert Jost; Tamás Szél; András Varró; Norbert Szentandrássy; Péter P Nánási; Kevin Burrage; Blanca Rodríguez
Journal: Biophys J Date: 2011-12-20 Impact factor: 4.033

4. Analysis of current fluctuations during after-hyperpolarization current in dentate granule neurones of the rat hippocampus.

Authors: T A Valiante; M A Abdul-Ghani; P L Carlen; P Pennefather
Journal: J Physiol Date: 1997-02-15 Impact factor: 5.182

5. cAMP-dependent protein kinase inhibits α7 nicotinic receptor activity in layer 1 cortical interneurons through activation of D1/D5 dopamine receptors.

Authors: Pragya Komal; Jasem Estakhr; Melad Kamran; Anthony Renda; Raad Nashmi
Journal: J Physiol Date: 2015-06-25 Impact factor: 5.182

6. Nonstationary fluctuation analysis of the delayed rectifier K channel in cardiac Purkinje fibers. Actions of norepinephrine on single-channel current.

Authors: P B Bennett; R Kass; T Begenisich
Journal: Biophys J Date: 1989-04 Impact factor: 4.033