Fig. 3

The distribution of high-grade and low-grade fasciculation in ALS and non-ALS muscle groups. The numbers in the figure represent the proportion of muscle groups with high-grade or low-grade fasciculation. For ALS patients, high-grade fasciculations were primarily distributed in the proximal muscle groups of lower limbs (12.2%) and upper limbs (11.9%), while low-grade fasciculations were primarily distributed in the distal muscle groups of lower limbs (16.2%) and upper limbs (11.0%). For non-ALS patients, most fasciculations were low-grade (88.1%) and primarily distributed in the distal muscle groups of lower limbs (30.3%) and upper limbs (29.7%)