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Essential tremor (ET), also called benign tremor, familial tremor, and idiopathic tremor, is a medical condition characterized by involuntary rhythmic contractions and relaxations (oscillations or twitching movements) of certain muscle groups in one or more body parts of unknown cause. [6]
Essential tremor may be treated with beta blockers (such as propranolol and nadolol) or primidone, an anticonvulsant; Cerebellar tremor symptoms may decrease with the application of alcohol (ethanol) or benzodiazepine medications, both of which carry some risk of dependence or addiction
It is hard to diagnose essential tremor and differentiate it from other types of tremor. [10] The burst discharge patterns of EMG signals is compared to the frequency and amplitude of videotaped tremors to evaluate and diagnose essential tremor.
Tremors are symmetric about a midpoint within the movement, and both portions of the movement occur at the same speed. Unlike the other hyperkinetic movements, tremors lack both the jerking associated movements and posturing. [4] Essential tremor (ET), also known as benign essential tremor, or familial tremor, is the most common movement ...
A diagnosis of solely intention tremor can only be made if the tremor is of low frequency (below 5 Hz) and without the presence of any resting tremors. [1] Electrophysiological studies can be useful in determining frequency of the tremor, and accelerometric studies quantify tremor amplitude.
DaTSCAN is indicated in cases of tremor when its origin is uncertain. Although this method can distinguish essential tremor from Parkinson's syndrome, it is unable to distinguish between Parkinson's disease, Dementia with Lewy bodies, Parkinson's disease dementia, [3] multiple system atrophy or progressive supranuclear palsy.
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