Which type of tremor occurs when a person is at rest?

Resting tremor is a specific type of tremor that occurs when a person is at rest and typically decreases or disappears during voluntary movement. This tremor is most commonly associated with Parkinson's disease and can manifest in various parts of the body, often starting in the hands. The distinguishing feature of a resting tremor is its occurrence in a relaxed state, as opposed to when the individual is actively moving or initiating an action.

In contrast, intention tremors arise during voluntary movements, such as when a person attempts to reach for an object. Action tremors are seen during movement and can occur with any form of voluntary action. Psychogenic tremors, on the other hand, are related to psychological factors rather than neurological conditions and may have variable characteristics. Thus, the defining characteristic of a resting tremor occurring when a person is at rest correctly identifies it as the answer to the question.