Longitudinal analysis of correlation between bulbar scale and ERD in individuals. A: 2 ALS patients. B: 2 controls. In ALS patients, disease duration and bulbar scale were negatively correlated. Bulbar scale and ERD were also negatively correlated. For controls, reproducibility of ERD was high and absolute ERD were larger than those of ALS patients.
Kasahara et al. BMC Neuroscience 2012 13:66 doi:10.1186/1471-2202-13-66