Fig. 2

The detection rate of fasciculation in each ALS and non-ALS muscle group. The columns represent the fasciculation detection rates for proximal flexors in upper limbs (78.4% vs. 12%), the proximal extensors in upper limbs (77.3% vs. 11.1%), the distal flexors in upper limbs (81.8% vs. 31.5%), the distal extensors in upper limbs (68.8% vs. 25%), the proximal flexors in lower limbs (80.7% vs. 16.7%), the proximal extensors in lower limbs (78.4% vs. 16.7%), the distal flexors in lower limbs (77.8% vs. 29.6%), the distal extensors in lower limbs (68.2% vs. 26.9%), suprahyoid muscles (35.2% vs. 0) and paravertebral muscles (62.5% vs. 2%) in ALS and non-ALS muscle groups, respectively. *The fasciculation detection rate for each muscle group in ALS patients was significantly higher than non-ALS patients, P < 0.001