E-Mail BOSTON -- Videos of people experiencing severe neurological symptoms, including convulsions and difficulty walking, purportedly after receiving a COVID-19 vaccine, have surfaced on Facebook, YouTube and other social media channels. The millions of people watching these videos might conclude that the vaccine is either quite dangerous to produce such symptoms or that the people in the videos are faking their symptoms. Both conclusions are incorrect, according to neurologist and psychiatrist David Perez, MD, MMSc, director of the Functional Neurological Disorders Unit at Massachusetts General Hospital (MGH). In a JAMA Neurology Viewpoint, the authors explain that the COVID-19 vaccine may precipitate the development of functional neurological disorder (FND), a neuropsychiatric disorder with symptoms such as limb weakness, gait problems, jerky movements, tremor and facial spasms. "The spread of these videos could fuel vaccine hesitancy by giving an overly simplistic impression of potential links between the vaccine and major neurological symptoms," says Perez, the piece's senior author. "Instead, these are symptoms of a real, brain-based disorder that sits at the intersection of neurology and psychiatry."