His hand began trembling for no apparent reason, two years ago. He first noticed it when he tried to pull a spoon from a bowl of soup. By the time the spoon reached his mouth, there was no broth left in it. Then when he attempted to concentrate on doing anything with exact precision, like signing a check, he found it impossible to steady his hand. The right-handed man — who happens to be my father — says this condition, which the doctors call an “essential tremor”, only happens with his right hand.

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