Functional connections among cortical regions: topography of EEG coherence

D. M. Tucker, D. L. Roth, T. B. Bair

Research output: Contribution to journalArticlepeer-review

139 Scopus citations


The covariance among EEG signals can be examined with coherence analysis. Evidence that the right hemisphere has a more diffuse receptotopic than the left, together with evidence that it may be have a higher propositon of white to gray matter, suggests a high degree of functional connectedness among right hemisphere regions. To determine whether this is reflected in greater EEG coherence among right than left hemisphere locations, we constructed a matrix of cross-spectra among all unique pairs of EEG channels in an 8-channel montage, then statistically de-structured this matrix to examine multipke coherences and both inter- and intra-hemispheric partialmultiple coherences Analyses on data from resting EEGs of 14-right-handed men examined weekly for several monts showed higher coherences for right hemisphere locations. For the inter-hemispheric partialmultiple coherences the frontal lobe values were also higher on the right, but the occipital inter-hemispheric coherences were higher on the left. These asymmetries have interesting parallels with anatomical asymmetries of the human cortex and may have functional implications.

Original languageEnglish (US)
Pages (from-to)242-250
Number of pages9
JournalElectroencephalography and Clinical Neurophysiology
Issue number3
StatePublished - Mar 1986
Externally publishedYes


  • coherence
  • hemisphere asymmetry
  • human EEG
  • normal subjects
  • spectral analysis

ASJC Scopus subject areas

  • General Neuroscience
  • Clinical Neurology


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