Ms. Hepburn's was referred to as familial tremor, the inherited form.

Essential tremor (ET), also known as benign essential tremor, or familial tremor, is the most common movement disorder.

In late 2009, Toni Tennille announced that Dragon had developed a mild form of Parkinson's disease which has manifested through a familial tremor.

Mr. Levy inherited what he calls a familial tremor from his father, which sometimes causes his hands to shake, and is worsened, he said, by fatigue and caffeine.