Migraine patients with aura show a peculiar pattern of visual reactivity compared with those of migraine patients without aura: an increased effective connectivity, connected to a reduced synchronization among EEG channels, for frequencies in the beta band. The effective connectivity is evaluated in terms of the Granger causality. This anomalous response to visual stimuli may play a crucial role in the progression of spreading depression and clinical evidences of aura symptoms.
@article{arxiv.1104.2532,
title = {Abnormal effective connectivity in migraine with aura under photic stimulation},
author = {Sebastiano Stramaglia and Daniele Marinazzo and Mario Pellicoro and Marina de Tommaso},
journal= {arXiv preprint arXiv:1104.2532},
year = {2011}
}