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Evaluating causal relations in neural systems: granger causality, directed transfer function and statistical
M Kamiński1, M Ding, W A Truccolo
1Center for Complex Systems and Brain Sciences, Florida Atlantic University, Boca Raton 33431, USA.
Biological Cybernetics
|August 18, 2001
Abstract:
We consider the question of evaluating causal relations among neurobiological signals. In particular, we study the relation between the directed transfer function (DTF) and the well-accepted Granger causality, and show that DTF can be interpreted within the framework of Granger causality. In addition, we propose a method to assess the significance of causality measures. Finally, we demonstrate the applications of these measures to simulated data and actual neurobiological recordings.