, Volume 85, Issue 2, pp 145-157

Evaluating causal relations in neural systems: Granger causality, directed transfer function and statistical assessment of significance

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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.

Received: 6 June 2000 / Accepted in revised form: 4 December 2000