Tremor Studies in Normals and in Parkinsonism

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Abstract
I. Introduction This study is devoted to the symptom of tremor which has been utilized by some to indicate the gross rhythmic oscillatory movement of the limbs in parkinsonism. Others use the word "tremulousness" to apply to the fine, irregular oscillations in the extremities of patients with such diseases as thyrotoxicosis or alcoholism. For the purposes of this study, tremor is a descriptive term to designate any oscillatory movement of a part of the body which is activated by skeletal muscle, be it regular or irregular, fine or gross, constant or periodic, present at rest or on actvity. It is true that different types of tremor exist, depending upon many factors, ranging from disease process to the position of the oscillating part. These factors, in relation to the normal and to the patient with parkinsonism, will be discussed. The purpose of this study is threefold. First, we desire to establish

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