Influence of the visuo-proprioceptive illusion of movement and motor imagery of the wrist on EEG cortical excitability among healthy participants
Fig 6
a) Boxplot of ERD percentages measured in each condition in the 8–28 Hz bands. The left boxplot represents the ERD percentage on the average of the μ and β frequencies in the combined condition (“Combined”), the second boxplot concerns the VPI condition (VP), the right boxplot concerns the MI condition (M). The crosses represent the means for ERD. NS means “non significant”. b) Topoplots of ERD percentages measured in each condition. The topoplots were averaged across all the participants. They are separated into rows, according to each condition tested (combined condition, VPI condition (VP), motor imagery condition (MI)), and in columns for 8-28Hz (μ-β bands), 8-13Hz (μ bands), and 13-28Hz (β bands). The red arrow locates the position of the C4 electrode. Red represents ERD; blue represents ERS. c) Power spectrum density analysis. Representation of each condition as a function of the signal power in the 8–28 Hz frequency bands on the C4 electrode. Each line represents one condition. Black: Resting state, red: combined condition, green: VPI condition (VP), blue: MI condition. d) Time frequency analysis. Representation of signal power as a function of task completion time (10 seconds) in the 8–28 Hz frequency bands under each condition. From top to bottom: combined condition, VPI condition (VP), MI condition. The red colour represents a greater decrease in signal power.