functional movement disorder definition
Functional movement disorders (FMDs) are clinical syndromes defined by the occurrence of abnormal involuntary movements that are incongruent with a known neurologic cause and are significantly improved on neurological exam with distraction or nonphysiologic maneuvers [ 1 ].mong our cohort of 206 patients with FMD, the most common functional involuntary movements were tremor (33 percent), dystonia (25 percent), myoclonus (25 percent), gait disorders (11 percent), and parkinsonism (6 percent) [ 20 ].