TREMORS CAUSES |
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The cause of essential tremor is not
known, although it is an inherited problem in more than half of all
cases. The genetic condition has an autosomal dominant inheritance
pattern, which means that any children of an affected parent will
have a 50% chance of developing the condition.
Essential tremor most often appears when the hands are being used,
whereas a person with Parkinson's disease will most often have a
tremor while walking or while the hands are resting. People with
essential tremor will usually have shaking head and hands, but the
tremor may involve other parts of the body. The shaking often begins
in the dominant hand and may spread to the other hand, interfering
with eating and writing. Some people also develop a quavering voice.
Essential tremor affects men and women equally. The shaking often
appears at about age 45, although the disorder may actually begin in
adolescence or early adulthood. Essential tremor that begins very
late in life is sometimes called "senile tremor."
Drugs and tremor
Several different classes of drugs can cause tremor as a side effect.
These drugs include amphetamines, antidepressants drugs,
antipsychotic drugs,caffeine, and lithium. Tremor also may be a sign
of withdrawal from alcohol or street drugs. |
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