Phase-Synchrony And Causality Analysis Of Brain Signals To Determine Signal Transduction Pathways In Color Perception

The paper introduces a novel approach to determine the color pathways in the human brains by a 2-step process. First the brain lobes having phase synchrony are identified by a frequency-domain analysis of the EEG signals acquired from 19 channels covering the entire sculp. Next, Granger causality is employed to determine the directional pathways on the resulting space obtained by phase-synchrony analysis. Experiments undertaken on 30 subjects confirm that the color pathways in human beings are unique and distinct for the 3 basic colors: red, green and blue. The research results obtained here also supports the existing works reported on signal transduction pathways for colored light. The proposed method of detecting signal transduction pathways during color perception has immense applications in diagnosis of malfunctioning of one or more brain lobes residing on the pathway for people suffering from color perceptual abnormality.Signaling Color Pathway, Hilbert Transform, Granger Causality Test, ADF, AIC, Phase Synchrony.