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Inter-hemispheric theta power (In μv2/Hz). Group mean (± S.E.) log transformed inter-hemispheric theta power asymmetry values (y-axis) for seven site pairs (x-axis) in PD patients and normal controls during emotional stimuli. More negative numbers indicate less delta power. Lower numbers (i.e., more negative) are associated with increased activation [45]. The significant site pair (p < 0.05) differences between the groups were marked as *.
