NDLI: Physiological tremor of the upper limb segments

Content Provider	Springer Nature Link
Author	Takakura, Masato Sakamoto, Kazuyoshi
Copyright Year	2001
Abstract	The acceleration signal produced by physiological tremor from four different upper limb segments (the finger, hand, forearm and upper limb) was measured by an acceleration sensor during holding posture and was analyzed by power spectrum analysis. Two prominent peaks appeared in the power spectrum, suggesting that the tremor in the four different limb segments was composed of two frequency components. The frequency of one peak at 8–12 Hz did not change between the different limb segments, while the frequency of the other peak decreased with the increase in the mass of the limb segment. A model with two reflex pathways was developed for the tremor in the four limb segments. The model includes two reflex pathways, a spinal pathway and a supraspinal pathway. The theoretical values of the frequency and the amplitude of the tremor predicted by the model were in good agreement with the experimental results. Analysis of the model revealed that one of the two frequency components of the tremor was of spinal origin and was dependent upon the mass of the limb segment, and the second was of supraspinal origin, corresponding to the frequency at 8–12 Hz. In the normal subject, it is possible that the tremor could be used to evaluate the change in neuromuscular function produced by prolonged work involving just part of a limb segments (e.g., typing). It may also be used to evaluate the neuromuscular function of patients suffering from neurological diseases such as muscular dystrophy and Parkinson's disease.
Starting Page	214
Ending Page	225
Page Count	12
File Format	PDF
ISSN	14396319
Journal	European Journal of Applied Physiology
Volume Number	85
Issue Number	3
e-ISSN	14396327
Language	English
Publisher	Springer-Verlag
Publisher Date	2001-07-07
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physiology (medical) Public Health, Environmental and Occupational Health Sports Science

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The organization of upper limb physiological tremor

The reorganization of tremulous movements in the upper limb due to finger tracking maneuvers

Bilateral organization of physiological tremor in the upper limb

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Failure of vascular autoregulation in the upper limb with increased +Gz acceleration

The origins of physiological tremor as deduced from immersions of the finger in various liquids

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Physiological tremor of the upper limb segments

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