tremor

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Related to essential tremor: intention tremor, head tremor

tremor

a minor earthquake

Tremor

 

an involuntary trembling of the entire body or parts of it. Tremors are characteristically rhythmic and stereotypic; usually they have a narrow range, most often affecting the fingers, eyelids, tongue, lower jaw, and head. In healthy subjects, tremors may be caused by muscular strain, emotional excitement, or exposure to cold. Pathological tremors may be symptoms of chronic alcoholism, thyrotoxicosis, neurotic states, acute infections, and such diseases as parkinsonism. The symptom is treated by treating the primary disease.

Eye tremor is an involuntary rapid movement of the eyeball in relation to the optic axis; its frequency is from 20 to 150 Hz, and its amplitude, from 5 to 15 seconds of arc. Visual perception itself depends to a significant degree on eye tremor, which produces constant changes in the illuminance of certain photoreceptors—that is, the photoreceptors located at the variously illuminated points of the retinal periphery. An image whose projection on the retina remains completely stable for more than a few seconds ceases to be perceived by the visual centers of the brain.

tremor

[′trem·ər]
(geophysics)
A minor earthquake. Also known as earthquake tremor; earth tremor.
(medicine)
Involuntary, rhythmic trembling of voluntary muscles resulting from alternate contraction and relaxation of opposing muscle groups.
References in periodicals archive ?
The report reviews key players involved Essential Tremor therapeutics and enlists all their major and minor projects
Interaction between blood lead concentration and deltaaminolevulinic acid dehydratase gene polymorphisms increases the odds of essential tremor.
Randomized trial comparing primidone initiation schedules for treating essential tremor.
Essential tremor is different from physiological tremors.
Jill Ostrem, who specializes in movement disorders like Parkinson's disease and essential tremors.
HS1-BP3 gene variant is common in familial essential tremor.
Give propranolol for essential tremor causing a patient distress, starting at 20 to 40 mg twice daily and increasing the dose (to a maximum of 320 mg/d) until relief is achieved.
A new evidence-based guideline issued by the American Academy of Neurology for the treatment of essential tremor reinforces the use of propranolol and primidone as the go-to agents for the disease.
A new evidence-based guideline issued by the American Academy f Neurology for the treatment of essential tremor reinforces the use of propranolol and primidone as the go-to agents for the disease.
Surgical treatment can be performed on patients diagnosed with select types of Parkinson's disease, Essential tremor, Secondary tremors, and Hemidystonias, Tourette's syndrome and other diseases.
ABSTRACT: Many patients with Parkinson disease, essential tremor, dystonia, or other movement disorders experience troublesome or disabling symptoms despite their use of maximal doses of medications.

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