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Essential tremor is a progressive [8] [9] [10] neurological disorder, and the most common movement disorder. Though not life-threatening, it can certainly be debilitating. Its onset is usually between 40 and 50 years of age, but it can occur at any age. [11] The cause is poorly understood.
Essential tremor (sometimes inaccurately called benign essential tremor) is the most common of the more than 20 types of tremor. Although the tremor may be mild and nonprogressive in some people, in others, the tremor is slowly progressive, starting on one side of the body but affecting both sides within 3 years.
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 ...
348.2 Benign intracranial hypertension; 348.3 Encephalopathy, unspecified; 348.4 Compression of brain; 348.5 Cerebral oedema; 348.8 Other; 348.9 Unspecified; 349 Other and unspecified disorders of the nervous system. 349.0 Reaction to spinal or lumbar puncture; 349.1 Nervous system complications from surgically implanted device
Essential tremor: 333.1 G25.0 Drug induced tremor G25.1 Other specified form of tremor G25.2 Myoclonus: 333.2 G25.3 Chorea (rapid, involuntary movement) Drug induced chorea: G25.4 Drug-induced tics and tics of organic origin 333.3 G25.6 Paroxysmal nocturnal limb movement G25.80 Painful legs (or arms), moving toes (or fingers) syndrome G25.81
The muscle rigidity, tremor at rest, and slowness in initiation and execution of movement that are the cardinal motor symptoms of Parkinson's disease are attributed to a reduction in dopaminergic activity in the basal ganglia motor areas, particularly the putamen, due to gradually reduced innervation from the pars compacta of substantia nigra. [6]
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