title: Teaching video neuroimages: orthostatic tremor: the helicopter sign.
abstract: A 63-year-old man presented with 4 years of orthostatic tremor while standing, resolving after sitting or leaning against a wall. There was marked subjective unsteadiness, but no falls. Surface EMG in arms and legs demonstrated a 14- to 16-Hz synchronous tremor in antagonist muscles (video on the Neurology Web site at www.neurology.org.).
authors.affiliation: Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY, USA.
authors.forename: Vincent S
authors.initials: VS
authors.lastname: DeOrchis
authors.forename: Howard L
authors.initials: HL
authors.lastname: Geyer
authors.forename: Steven
authors.initials: S
authors.lastname: Herskovitz
mesh_terms: D004576:Electromyography; D006801:Humans; D008297:Male; D008875:Middle Aged; D011187:Posture; D014202:Tremor / Q000175:diagnosis*; D014743:Videotape Recording