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Figure 4 Group data in 16 patients with amyotrophic lateral sclerosis (ALS) and 25 normal controls (A) revealed a significant reduction in the strength–duration time constant in patients with ALS compared with controls after a maximum voluntary contraction (MVC) of 60 s duration. (B) Superexcitability, a sensitive parameter of membrane potential, was increased in patients with ALS and controls after MVC. The filled bar represents the period of MVC.
