Fig. 6From: Spatial filtering for enhanced high-density surface electromyographic examination of neuromuscular changes and its application to spinal cord injuryZ scores derived from four methods: a simply averaging, b PCA-based spatial filtering, c NMF-based spatial filtering, and d PCA-NMF-based spatial filtering. 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