Extrapyramidal Symptom Rating Scale-Abbreviated Clinical Classification Extrapyramidal Symptom Rating Scale-Abbreviated Clinical Classification C117997 Extrapyramidal Symptom Rating Scale-Abbreviated (ESRS-A) (Copyright 2006 Larry Alphs, MD, PhD, Guy Chouinard, MD, All Rights Reserved). Intellectual Product CDISC ESRSA ESRS-A Extrapyramidal Symptom Rating Scale-Abbreviated Clinical Classification ESRSA1 C3896675 A standardized rating scale originally developed by Chouinard et al in 1980, which is used to measure drug-induced extrapyramidal symptoms (EPS) or 4 types of drug-induced movement disorders (DIMD): parkinsonism, akathisia, dystonia, and tardive dyskinesia. The questionnaire contains 28 questions and generates 4 subscales and 4 clinical global impression severity (CGI-S) scales. Research or Clinical Assessment Tool