title: Tremor frequency shift in orthostatic tremor from low to high frequencies due to forceful muscle contractions.
authors.forename: M
authors.initials: M
authors.lastname: Poersch
authors.forename: B
authors.initials: B
authors.lastname: Köster
mesh_terms: D004576:Electromyography; D006801:Humans; D007537:Isometric Contraction; D009119:Muscle Contraction; D018482:Muscle, Skeletal / Q000503:physiopathology; D011187:Posture; D014202:Tremor / Q000503:physiopathology*