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Abnormal effective connectivity in migraine with aura under photic stimulation

By Sebastiano Stramaglia, Daniele Marinazzo, Mario Pellicoro and Marina de Tommaso


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.Comment: 4 pages, 6 figure

Topics: Quantitative Biology - Neurons and Cognition, Condensed Matter - Disordered Systems and Neural Networks, Physics - Medical Physics
Year: 2011
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