Inconsistency and incongruence: the two diagnostic pillars of functional movement disorder

FMD is not a diagnosis of exclusion and can be established by clearly demonstrating the two clinical pillars of the disorder: inconsistency (or variability or distractibility) of the amplitude, distribution, and severity of the phenotype; and incongruence with the wide spectrum of manifestations of other neurological disorders. [...]delivering and explaining the diagnosis to the patient is a critical step in the care pathway. AJE has received grant support from the National Institutes of Health (NIH) and the Michael J Fox Foundation; personal compensation as a consultant and scientific advisory board member for Neuroderm, Neurocrine, Amneal, Acadia, Acorda, Bexion, Kyowa Kirin, Sunovion, Supernus (formerly, USWorldMeds), Avion Pharmaceuticals, and Herantis Pharma; personal compensation as honoraria for speakership for Avion; and publishing royalties from Lippincott Williams & Wilkins, Cambridge University Press, and Springer.