Fig. 1

A Distribution of the maximum fasciculation scores in ALS and non-ALS patients. The proportion of ALS patients with the maximum fasciculation score of 4 (71 [80.7%]) was the highest, followed by 2 (9 [10.2%]) and 3 (8 [9.1%]), with no scores of 1 or 0. The proportion of non-ALS patients with the maximum fasciculation score of 2 (21 [38.9%]) was the highest, followed by 0 (18 [33.3%]), 1 (10 [18.5%]), and 4 (5 [9.3%]), with no scores of 3. B Distribution of the fasciculation grade in ALS and non-ALS muscle groups. In ALS muscle groups, the fasciculation of grades 0, 1, 2, 3, and 4 accounted for 27.2, 18.6, 24, 9.3, and 20.9%, respectively. In non-ALS muscle groups, the fasciculation of grades 0, 1, 2, 3, and 4 accounted for 82, 11.1, 4.8, 0.8, and 1.4%, respectively