Fig. 4

2D plots of 3D NMDS data based on Bray-Curtis dissimilarity. a SNI and Sham on day − 1 are not significantly different (PERMANOVA: p value = 0.7), thus combined as a group and showed significantly different with SNI and Sham groups on day 6 (PERMANOVA: p value = 0.047; n = 12); b All SNI and Sham groups on days 6 and 14 are significantly different (PERMANOVA: p value = 0.048; n = 12)