Abstract
Essential Tremor (ET) is the most common neurological movement disorder, with slowly progressive symptoms that impact the patient's quality of life and ability to perform activities of daily living. Tremors in ET occur during kinetic, with two subtypes: postural tremors and kinetic tremors. Postural tremors appear when the arms are topically maintained in a position against gravity, whereas kinetic tremors appear during sustained voluntary movements such as writing or drawing. The underlying mechanisms of either tremor type are not known, and further work is needed to determine whether they are two manifestations of the same brain dysfunction, or consequences of different underlying causes. To further understand these disease manifestations, we employed functional magnetic resonance imaging (fMRI) in conjunction with quantitative tremor measures (accelerometry and spirography).