Vial, FelipeAttaripour, SanazHallett, Mark2022-07-062022-07-062019Vial F, Attaripour S, Hallett M. Differentiating tics from functional (psychogenic) movements with electrophysiological tools. Clin Neurophysiol Pract. 2019 Jun 28;4:143-147. doi:10.1016/j.cnp.2019.04.005https://doi.org/10.1016/j.cnp.2019.04.005http://hdl.handle.net/11447/6305Objective: We report on two patients that presented to our clinic with the differential diagnosis of functional movement disorder vs tic disorder. Case reports: The first patient is a 23-year-old woman with a 3-year history of repetitive involuntary neck flexion movements. The second patient is a 59-year-old man with a 10-month history of involuntary trunk jerks. In both cases, the polyelectromyographic study and the observation of Bereitschaftspotential helped us in making the final diagnosis. Significance: The use of electrophysiological tools can be helpful in making the distinction between functional movement disorders and tic disorders.enBereitschaftspotentialFunctional movementPsychogenic movementTicArticle