Definition of Familial tremor:
Familial tremor is an involuntary shaking movement that tends to run in families. Involuntary means you shake without trying to do so.
See also:
Causes, incidence, and risk factors:
Tremors occur when there is a problem with the nerves supplying certain muscles. They may affect the whole body or just certain areas, such as your hand.
Familial tremor is a lot like essential tremor, except that the shaking affects more than one person in a family. The exact cause of familial tremor is unknown, but the fact that it is passed down through families (inherited) suggests that genes play a role. Familiar tremor is usually a dominant trait, which means that you only need to get the gene from one parent to develop the disorder.
The tremors usually start in early middle age, but may be seen in people who are older or younger.
