Biological Cybernetics

, Volume 84, Issue 6, pp 463–474 | Cite as

Partial directed coherence: a new concept in neural structure determination

  • Luiz A. Baccalá
  • Koichi Sameshima


 This paper introduces a new frequency-domain approach to describe the relationships (direction of information flow) between multivariate time series based on the decomposition of multivariate partial coherences computed from multivariate autoregressive models. We discuss its application and compare its performance to other approaches to the problem of determining neural structure relations from the simultaneous measurement of neural electrophysiological signals. The new concept is shown to reflect a frequency-domain representation of the concept of Granger causality.


Time Series Coherence Structure Determination Information Flow Simultaneous Measurement 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2001

Authors and Affiliations

  • Luiz A. Baccalá
    • 1
  • Koichi Sameshima
    • 2
  1. 1. Telecommunications and Control Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Luciano Gualberto, Trav. 3, 158, CEP 05508-900, BrazilBR
  2. 2. Discipline of Medical Informatics & Functional Neurosurgery Laboratory, School of Medicine, University of São Paulo, BrazilBR

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