Tremors can start at any age, from birth through advanced ages (senile tremor).

She hoped her voice didn't tremble with repressed laughter on that... or would he think it was a senile tremor?

American neurologists not connected with the Pope's case say that the lack of any worsening of the condition suggests that the tremor could be a common and not serious problem known as a senile tremor.

Starting at the belt buckle, the right rubber glove, full to bursting, moved jerkily, by remote control, to chest, then to shoulder level, presented first the straight-arm, then the bent-arm Party salute, returned sluggishly, just barely in time, for the mechanism was running down, to the belt buckle, gave a senile tremor or two and fell asleep.