What Is an Action Tremor?

Action tremor, the name of the disease, is one of the symptoms of patients with cerebellar injury.

Action tremor

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Action tremor, the name of the disease, is one of the symptoms of patients with cerebellar injury.

In patients with cerebellar injury, there is a disorder in voluntary movement: excessive or insufficient movement, fatigue, direction deviation, loss of movement stability, especially the start, stop and change of direction of movement are more hindered, showing a so-called ataxia Tremor (ataxic tremor). For example, in the clinical finger-nose test, excessive or insufficient discrimination occurred, and the direction shifted. Another example is when the patient moves his finger from the tip of the nose to touch the examiner's finger, an obvious tremor motion occurs. As shown in the figure, when the patient moves his finger close to the examiner's finger, the tremor motion performance is more obvious. This type of tremor is also called intention tremor or cerebellar action tremor. The reason that the cerebellum can regulate the stability of limb movement to reach its goal is mainly because the cerebellum has the facilitation and inhibition relationships necessary for the cerebral motor cortex and brainstem structure, and assists the two systems to start and Stop exercise to reach the state required for effective and complete control of exercise.