Frequency and dependence of long range temporal correlations in human hippocampal energy fluctuations

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Spontaneous energy fluctuations in human hippocampal EEG show prominent amplitude and temporal variability. Here we show hippocampal energy fluctuations often exhibit long-range temporal correlations with power-law scaling. In most cases this scaling behavior persisted on time scales in excess of 10 minutes, the maximum duration we could detect with our recording durations. During these epochs we find that the energy fluctuations exhibit long-range correlations over a broad frequency range (0.5-100 Hz) with greater persistence of the correlations in the lower frequency bands (0.5-30 Hz) than the higher (30-100 Hz). The correlation in hippocampal energy fluctuations is characterized by a bias for energy fluctuations to be followed by similar magnitude fluctuations over all energy scales, i.e. large fluctuations begets large fluctuations and small begets small.

Original languageEnglish (US)
Pages (from-to)35-44
Number of pages10
JournalComplexity
Volume10
Issue number5
DOIs
StatePublished - May 2005

Fingerprint

energy
Electroencephalography
duration
Power (Psychology)

Keywords

  • EEG
  • Epilepsy
  • Hippocampus
  • Long-range correlations
  • Scaling behavior

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

Cite this

Frequency and dependence of long range temporal correlations in human hippocampal energy fluctuations. / Stead, Squire Matthew; Worrell, Gregory Alan; Litt, B.

In: Complexity, Vol. 10, No. 5, 05.2005, p. 35-44.

Research output: Contribution to journalArticle

@article{bb98db85fe44419c9aac36f3ee43e7b6,
title = "Frequency and dependence of long range temporal correlations in human hippocampal energy fluctuations",
abstract = "Spontaneous energy fluctuations in human hippocampal EEG show prominent amplitude and temporal variability. Here we show hippocampal energy fluctuations often exhibit long-range temporal correlations with power-law scaling. In most cases this scaling behavior persisted on time scales in excess of 10 minutes, the maximum duration we could detect with our recording durations. During these epochs we find that the energy fluctuations exhibit long-range correlations over a broad frequency range (0.5-100 Hz) with greater persistence of the correlations in the lower frequency bands (0.5-30 Hz) than the higher (30-100 Hz). The correlation in hippocampal energy fluctuations is characterized by a bias for energy fluctuations to be followed by similar magnitude fluctuations over all energy scales, i.e. large fluctuations begets large fluctuations and small begets small.",
keywords = "EEG, Epilepsy, Hippocampus, Long-range correlations, Scaling behavior",
author = "Stead, {Squire Matthew} and Worrell, {Gregory Alan} and B. Litt",
year = "2005",
month = "5",
doi = "10.1002/cplx.20088",
language = "English (US)",
volume = "10",
pages = "35--44",
journal = "Complexity",
issn = "1076-2787",
publisher = "John Wiley and Sons Inc.",
number = "5",

}

TY - JOUR

T1 - Frequency and dependence of long range temporal correlations in human hippocampal energy fluctuations

AU - Stead, Squire Matthew

AU - Worrell, Gregory Alan

AU - Litt, B.

PY - 2005/5

Y1 - 2005/5

N2 - Spontaneous energy fluctuations in human hippocampal EEG show prominent amplitude and temporal variability. Here we show hippocampal energy fluctuations often exhibit long-range temporal correlations with power-law scaling. In most cases this scaling behavior persisted on time scales in excess of 10 minutes, the maximum duration we could detect with our recording durations. During these epochs we find that the energy fluctuations exhibit long-range correlations over a broad frequency range (0.5-100 Hz) with greater persistence of the correlations in the lower frequency bands (0.5-30 Hz) than the higher (30-100 Hz). The correlation in hippocampal energy fluctuations is characterized by a bias for energy fluctuations to be followed by similar magnitude fluctuations over all energy scales, i.e. large fluctuations begets large fluctuations and small begets small.

AB - Spontaneous energy fluctuations in human hippocampal EEG show prominent amplitude and temporal variability. Here we show hippocampal energy fluctuations often exhibit long-range temporal correlations with power-law scaling. In most cases this scaling behavior persisted on time scales in excess of 10 minutes, the maximum duration we could detect with our recording durations. During these epochs we find that the energy fluctuations exhibit long-range correlations over a broad frequency range (0.5-100 Hz) with greater persistence of the correlations in the lower frequency bands (0.5-30 Hz) than the higher (30-100 Hz). The correlation in hippocampal energy fluctuations is characterized by a bias for energy fluctuations to be followed by similar magnitude fluctuations over all energy scales, i.e. large fluctuations begets large fluctuations and small begets small.

KW - EEG

KW - Epilepsy

KW - Hippocampus

KW - Long-range correlations

KW - Scaling behavior

UR - http://www.scopus.com/inward/record.url?scp=23044480528&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23044480528&partnerID=8YFLogxK

U2 - 10.1002/cplx.20088

DO - 10.1002/cplx.20088

M3 - Article

AN - SCOPUS:23044480528

VL - 10

SP - 35

EP - 44

JO - Complexity

JF - Complexity

SN - 1076-2787

IS - 5

ER -