ABSTRACT
Southern Illinois University School of Medicine, Springfield, Illinois, USA
I. Clinical Classification of Tremor 77
II. Clinical Characteristics of Essential Tremor 79
III. Diagnostic Criteria for Essential Tremor 80
A. Clinical Diagnostic Criteria 80
B. Electrophysiologic Criteria 82
C. Genetic Criteria 83
D. Pharmacologic Criteria 84
IV. Differential Diagnosis of Essential Tremor 84
V. Conclusions 87
Acknowledgments 87
References 87
I. CLINICAL CLASSIFICATION OF TREMOR
Tremor is an involuntary oscillation of a body part and is commonly classified
according to the behavioral circumstances in which it occurs (Table 6.1) (1).
Tremor may occur during attempted relaxation (rest tremor), during a voluntarily
held posture (postural tremor), or during a voluntary movement (kinetic tremor).
