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Essential Tremor.


StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2019-.
2019 Feb 3.

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New York University School of Medicine
NYU School of Medicine


Tremor is defined as an involuntary rhythmic and oscillatory movement of a body part with a relatively constant frequency and variable amplitude. Alternating contractions of antagonistic muscles cause it. Tremor is the most common of all movement disorders, and essential tremor is the most common neurologic cause of postural or action tremor. It usually presents as a bilateral postural 6 to 12 Hz tremor of the hands, followed by a kinetic and resting component. The upper limbs are often symmetrically involved, but with disease progression, the head and voice (less commonly legs, jaw, face, and trunk) may be involved. Although benign regarding its effect on life expectancy, it often causes embarrassment and, in a small percentage of patients, also serious disability. Symptoms are typically progressive and potentially disabling, often forcing patients to change jobs or seek early retirement.[1][2][3][4]

Copyright © 2019, StatPearls Publishing LLC.

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