[Development of Diagnostic Criteria].

Among the proposed ALS diagnostic criteria, the revised El Escorial diagnostic criteria was the most frequently utilized in clinical trials and clinical practice. However, its low sensitivity in early stage ALS prompted development of the Awaji electrodiagnostic criteria that incorporated fasciculation potentials and resulted in greater diagnostic sensitivity than the revised El Escorial criteria. Further improvements could include the updated Awaji criteria that is concordant between clinically- and electrodiagnostically-diagnosed cases, as well as the inclusion of ultrasound-detected fasciculations.