The cause of ET is unknown. However, it does run in families. When inherited, it is often called familial tremor. Children of parents with ET have a 50% chance of inheriting the condition.
In cases where there is no family history of tremor, other factors, such as toxins, may play a role, though this is far from clear. It is thought that essential tremor arises from abnormalities of specific circuits in the brain. This is an area that researchers are studying.
The Nervous System
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