Physiological Tremor, Pathological Tremors, and Clonus
نویسندگان
چکیده
منابع مشابه
Physiological and pathological tremors and rhythmic central motor control.
In recent years there has been increasing interest in oscillatory neural activity in the CNS and in the role that such activity may have in motor control. It is thought that physiological tremor may be a manifestation in the periphery of such central oscillatory activity and that some pathological tremors are the result of derangement of these oscillators. This review re-evaluates both early an...
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Resting and postural tremor, intention and action tremor, clonus and the cogwheel phenomenon in Parkinson's disease have been characterised in terms of frequency content using spectral analysis. Typical resting tremor ranged in peak frequency from 4 to 5.3 HZ with tremor in each individual varying only by 0.2 to 0.3 HZ. The peak frequency of postural tremor ranged between 6 and 6.2 HZ. Intentio...
متن کاملPhysiological Tremor
he contraction of a voluntary muscle is accompanied by tremors of the muscle in the form of minute oscillations. In an electrical recording of the muscle's activity the tremor can be seen as a trace of very fine rhythmic movements superimposed on the record of the contraction itself. The amplitude of the oscillations is about a hundredth or a fiftieth as large as that of the total movement prod...
متن کاملA Case of Action-Induced Clonus that Mimicked Action Tremors and was Associated with Cervical Schwannoma
Clonus is the rhythmic muscle contraction which usually occurs in patients with lesions involving descending motor pathways. Sometimes, rhythmic oscillation of action induced clonus could be confused to action tremor. We report a case of action induced clonus associated with cervical schwannoma which was misdiagnosed as essential tremor. The patient had spasticity in all limbs with exaggerated ...
متن کاملPhysiological tremor in children.
A rhythmic tremor at about 10 c./sec. is a wellknown feature of muscular contraction in healthy adults. In some subjects the amplitude of the tremor is such that it is discernible by the naked eye, while in others sensitive methods of recording are required for its detection. While studying this phenomenon Marshall and Walsh (1956) noticed that the tremor in six normal children was slower than ...
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ژورنال
عنوان ژورنال: Journal of Neurology, Neurosurgery & Psychiatry
سال: 1979
ISSN: 0022-3050
DOI: 10.1136/jnnp.42.12.1169-c