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16 Cards in this Set
- Front
- Back
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Definition
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an involuntary, rhythmic, oscillatory movement of a body part
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Rest tremors
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occur in a body part that is relaxed and completely supported against gravity
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Action tremors
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occur with voluntary contraction of a muscle and can be further subdivided into postural, isometric, and kinetic tremors.
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Normal tremor
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All persons have low-amplitude, high-frequency physiologic tremors at rest and during action that are not reported as symptomatic.
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Essential tremor
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The most common pathologic tremor is essential tremor.
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Tremor of parkinson's disease
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More than 70 percent of patients with Parkinson disease have tremor as the presenting feature. This tremor is typically asymmetric, occurs at rest, and becomes less prominent with voluntary movement
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Evaluation
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A comprehensive review of medications (prescribed and over-the-counter), with specific attention to medications started proximal to the onset of tremor, is important in patients with new-onset tremor.
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How to get the diagnosis
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The diagnosis of tremor is based on clinical information obtained from a thorough history and physical examination
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Rest tremor
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A rest tremor is usually caused by parkinsonism.
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Tremor in children
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Tremor in children is potentially serious; patients should be promptly referred to a neurologist.
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Method of diagnosis
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For particularly difficult tremor cases, single-photon emission computed tomography to visualize the integrity of the dopaminergic pathways in the brain may be useful to diagnose Parkinson disease.
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Action
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Occurs with voluntary contraction of muscle
Includes postural, isometric, and kinetic tremors |
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Postural
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Occurs when the body part is voluntarily maintained against gravity
Includes essential, physiologic, cerebellar, dystonic, and drug-induced tremors |
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Kinetic
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Occurs with any form of voluntary movement
Includes classic essential, cerebellar, dystonic, and drug-induced tremors |
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Intention
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Subtype of kinetic tremor amplified as the target is reached
Presence of this type of tremor implies that there is a disturbance of the cerebellum or its pathways |
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Rest
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Occurs in a body part that is relaxed and completely supported against gravity
Most commonly caused by parkinsonism, but may also occur in severe essential tremor |
