An increased density of GFAP in the ventral horns in ALS cases (P = 0.0272) and specifically in those cases with moderate (P = 0.0218) but not SDD (P = 0.2648) was observed (Figure 2I–L), but no differences in expression were found in the lateral tracts (Figure 2M–P). Here, GFAP is linked to amyotrophic lateral sclerosis.