Evidence map›Paper›PMID 11916851›Full record

ArticleBiophysical journal2002

Applying hidden Markov models to the analysis of single ion channel activity.

L Venkataramanan, F J Sigworth

Abstract read
In one paragraph

Article in Biophysical journal, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers.

0numbers the graph read from it
0cells of the map it votes in
46citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

46 citing papers in PubMed.

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  16. Is realistic neuronal modeling realistic?Journal of neurophysiology · 2016
    Review
  17. Article
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

L VenkataramananSchlumberger-Doll Research, Ridgefield, Connecticut 06877, USA.
F J Sigworth

Funding

FLUCTUATIONS IN IONIC CURRENT THROUGH MEMBRANE CHANNELSR01NS021501 · NINDS · YALE UNIVERSITY · PI SIGWORTH, FREDERICK J · 1985 to 2024
$10.9M
COMPUTER ALGORITHMS FOR ANALYSIS OF PATCH CLAMP DATAR01NS035282 · NINDS · YALE UNIVERSITY · PI SIGWORTH, FREDERICK J · 1995 to 1997
–
NINDS NIH HHS NS21501NINDS NIH HHS NS35282
6 · The paper itself

Abstract

Hidden Markov models have recently been used to model single ion channel currents as recorded with the patch clamp technique from cell membranes. The estimation of hidden Markov models parameters using the forward-backward and Baum-Welch algorithms can be performed at signal to noise ratios that are too low for conventional single channel kinetic analysis; however, the application of these algorithms relies on the assumptions that the background noise be white and that the underlying state transitions occur at discrete times. To address these issues, we present an "H-noise" algorithm that accounts for correlated background noise and the randomness of sampling relative to transitions. We also discuss three issues that arise in the practical application of the algorithm in analyzing single channel data. First, we describe a digital inverse filter that removes the effects of the analog antialiasing filter and yields a sharp frequency roll-off. This enhances the performance while reducing the computational intensity of the algorithm. Second, the data may be contaminated with baseline drifts or deterministic interferences such as 60-Hz pickup. We propose an extension of previous results to consider baseline drift. Finally, we describe the extension of the algorithm to multiple data sets.

Indexed as

AlgorithmsBiophysicsIonsKineticsLikelihood FunctionsMarkov ChainsModels, StatisticalModels, TheoreticalPatch-Clamp TechniquesTime FactorsIons

Identifiers

PMID11916851
PMCPMC1301989

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.