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- $Unique_ID{BRK03523}
- $Pretitle{}
- $Title{Benign Essential Tremor}
- $Subject{Benign Essential Tremor Hereditary Benign Tremor Presenile Tremor
- Syndrome Familial Tremor}
- $Volume{}
- $Log{}
-
- Copyright (C) 1986, 1990 National Organization for Rare Disorders, Inc.
-
- 140:
- Benign Essential Tremor
-
- ** IMPORTANT **
- It is possible the main title of the article (Benign Essential Tremor) is
- not the name you expected. Please check the SYNONYMS listing to find
- alternate names and disorder subdivisions covered by this article.
-
- Synonyms
-
- Hereditary Benign Tremor
- Presenile Tremor Syndrome
- Familial Tremor
-
- General Discussion
-
- ** REMINDER **
- The information contained in the Rare Disease Database is provided for
- educational purposes only. It should not be used for diagnostic or treatment
- purposes. If you wish to obtain more information about this disorder, please
- contact your personal physician and/or the agencies listed in the "Resources"
- section.
-
-
- Benign Essential Tremor is a disorder of unknown cause which usually does not
- result in serious disability. This disorder mainly involves the upper
- extremities. While the onset may occur in either childhood or old age, young
- adults are affected most frequently, with the mean age onset being forty-five.
-
- Symptoms
-
- The main symptom of Benign Essential Tremor is a rhythmical tremor which may
- be either fine or coarse. The tremor usually has a frequency of 4-12 times
- per second when the affected part is in movement or voluntarily held in one
- position. (Parkinson's Disease tremors usually diminish or disappear
- entirely with purposeful movement.) The tremors mainly affect the upper
- extremities and are aggravated by stress, anxiety, fatigue and cold
- temperatures. Relief from the tremors may be achieved by rest, sedation, or
- the use of alcohol. (The use of alcohol to relieve tremors should be
- discouraged as it can lead to alcohol abuse.) Speech may be involved and
- there may be hyperhidrosis (excessive sweating). The symptoms of this
- disorder generally stabilize after a period of progression.
-
- Causes
-
- About half of Essential Tremor cases are considered sporadic, the other half
- hereditary. The cause of Benign Essential Tremor is not known. The disorder
- may be inherited as an autosomal dominant trait. (Human traits including the
- classic genetic diseases, are the product of the interaction of two genes for
- that condition, one received from the father and one from the mother. In
- dominant disorders, a single copy of the disease gene (received from either
- the mother or father) will be expressed "dominating" the normal gene and
- resulting in appearance of the disease. The risk of transmitting the
- disorder from affected parent to offspring is 50% for each pregnancy
- regardless of the sex of the resulting child.)
-
- Affected Population
-
- Males and females are affected equally with Benign Essential Tremor.
-
- Therapies: Standard
-
- Tremor associated with Benign Essential Tremor may be diminished or
- controlled by the use of medications such as phenobarbital, propranolol or
- primidone which is often effective in reducing the tremor. Rest may be
- useful. While alcohol can relieve the symptoms, its use can lead to alcohol
- abuse and should be avoided.
-
- Therapies: Investigational
-
- This disease entry is based upon medical information available through June
- 1990. Since NORD's resources are limited, it is not possible to keep every
- entry in the Rare Disease Database completely current and accurate. Please
- check with the agencies listed in the Resources section for the most current
- information about this disorder.
-
- Resources
-
- For more information on Benign Essential Tremor, please contact:
-
- National Organization for Rare Disorders (NORD)
- P.O. Box 8923
- New Fairfield, CT 06812-1783
- (203) 746-6518
-
- International Tremor Foundation
- 360 West Superior St.
- Chicago, IL 60610
- (312) 664-2344
-
- NIH/National Institute of Neurological Disorders & Stroke (NINDS)
- 9000 Rockville Pike
- Bethesda, MD 20892
- (301) 496-5751
- (800) 352-9424
-
- For genetic information and genetic counseling referrals, please contact:
-
- March of Dimes Birth Defects Foundation
- 1275 Mamaroneck Avenue
- White Plains, NY 10605
- (914) 428-7100
-
- Alliance of Genetic Support Groups
- 35 Wisconsin Circle, Suite 440
- Chevy Chase, MD 20815
- (800) 336-GENE
- (301) 652-5553
-
- References
-
- CECIL TEXTBOOK OF MEDICINE, 18th ed.: James B. Wyngaarden, and Lloyd H.
- Smith, Jr., Eds.: W. B. Saunders Co., 1988. P. 2146.
-
- THE MERCK MANUAL 15th ed: R. Berkow, et al: eds; Merck, Sharp & Dohme
- Research Laboratories, 1987. P. 1417-18.
-
-