Fig. 4From: Spatial filtering for enhanced high-density surface electromyographic examination of neuromuscular changes and its application to spinal cord injuryZ scores derived from four selected channels: a channel 28, b channel 31, c channel 37 and d channel 64. The Z scores from SCI-left group, SCI-right group and control group are shown separately. The normal range (solid line) is presented within ± 2.5Back to article page