Action Tremors

Action tremors are tremors that increase when the hand or foot is moving voluntarily. Action tremors occur during any type of movement of an affected body part. There are several subclassifications of action tremors. A postural tremor occur when the person maintains a position against gravity, such as holding the arms outstretched. Kinetic tremors appear during movement of a body part, such as moving the wrists up and down, while intention tremor is present during a purposeful movement toward a target, such as touching a finger to one's nose during a medical exam. Task-specific tremors appear when performing highly skilled, goal-oriented tasks such as handwriting or speaking. Isometric tremor occurs during a voluntary muscle contraction that is not accompanied by any movement. An example of a resting tremor is shown in the video below: