Evidence map›Paper›PMID 20600317›Full record

ArticleJournal of neuroscience methods2010

Cross-correlation of instantaneous amplitudes of field potential oscillations: a straightforward method to estimate the directionality and lag between brain areas.

Avishek Adhikari, Torfi Sigurdsson, Mihir A Topiwala, Joshua A Gordon

Abstract read
In one paragraph

Article in Journal of neuroscience methods, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 62 papers.

0numbers the graph read from it
0cells of the map it votes in
62citing papers in PubMed
1.8field-weighted citation impact, top 16% of its field
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

62 citing papers in PubMed, 112 citations in OpenAlex.

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  4. [Effects of 40 Hz light flicker stimulation on hippocampal-prefrontal neural activity characteristics during working memory tasks in Alzheimer's disease model rats].Sheng wu yi xue gong cheng xue za zhi = Journal of biomedical engineering = Shengwu yixue gongchengxue zazhi · 2025
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2 more citing papers are in PubMed but not listed here.

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

4 authors at 2 institutions in 1 country.

Avishek AdhikariDepartment of Biological Sciences, Columbia University, New York, NY 10032, United States.
Torfi Sigurdsson
Mihir A Topiwala
Joshua A Gordon
Columbia University · USNew York State Psychiatric Institute

Funding

Neural mechanisms of increased anxiety in serotonin 1A receptor-deficient miceR01MH081968 · NIMH · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI LEONARDO, EDUARDO DAVID · 2008 to 2017
$3.7M
Neural correlates of anxiety in 5-HT1AR knockout miceK08MH069823 · NIMH · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI GORDON, JOSHUA A · 2004 to 2008
$883k
NIMH NIH HHS K08 MH069823NIMH NIH HHS K08 MH098623NIMH NIH HHS R01 MH081958NIMH NIH HHS R01 MH081968
6 · The paper itself

Abstract

Researchers performing multi-site recordings are often interested in identifying the directionality of functional connectivity and estimating lags between sites. Current techniques for determining directionality require spike trains or involve multivariate autoregressive modeling. However, it is often difficult to sample large numbers of spikes from multiple areas simultaneously, and modeling can be sensitive to noise. A simple, model-independent method to estimate directionality and lag using local field potentials (LFPs) would be of general interest. Here we describe such a method using the cross-correlation of the instantaneous amplitudes of filtered LFPs. The method involves four steps. First, LFPs are band-pass filtered; second, the instantaneous amplitude of the filtered signals is calculated; third, these amplitudes are cross-correlated and the lag at which the cross-correlation peak occurs is determined; fourth, the distribution of lags obtained is tested to determine if it differs from zero. This method was applied to LFPs recorded from the ventral hippocampus and the medial prefrontal cortex in awake behaving mice. The results demonstrate that the hippocampus leads the mPFC, in good agreement with the time lag calculated from the phase locking of mPFC spikes to vHPC LFP oscillations in the same dataset. We also compare the amplitude cross-correlation method to partial directed coherence, a commonly used multivariate autoregressive model-dependent method, and find that the former is more robust to the effects of noise. These data suggest that the cross-correlation of instantaneous amplitude of filtered LFPs is a valid method to study the direction of flow of information across brain areas.

Indexed as

Signal Processing, Computer-AssistedAnimalsBiological ClocksBrainComputer SimulationElectrophysiologyEvoked PotentialsMaleMiceMice, 129 StrainMice, Inbred C57BLNerve NetNeurophysiology

Identifiers

PMID20600317
PMCPMC2924932
OpenAlexW2000013841

What OpenQuestion holds

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LicenceTDM
Read underepoch 390

Registered trials

None linked

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.