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1 Acta of Bioengineering and Biomechanics

1 1999

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Power spectrum characteristics of physiologic and pathologic tremor

Berme N., Oggero E., Pagnacco G.

Acta of Bioengineering and Biomechanics

1999

Vol. 1, nr 1

71-88

To measure tremor characteristics independently of the testing protocol used (subject standing, sitting or laying) a highly sensitive ballistocardiographic bed was built using strain gauge technology. This resulted in an accurate, low cost, simple, lightweight and transportable instrument. Coupling this instrument with a high-resolution data acquisition and analysis technique it was possible to detect the variation in the ground reaction force due to the heart pumping action, and identify its characteristic power spectrum signature. Different experimental protocols were completed, focusing on the inter-subject as well as intra-subject variability, on the gender dependency, on the effect of footwear, on the body and foot position in normal subjects. Furthermore, a preliminary study on tremor inducting pathologies allowed detecting what seems to be a characteristic signature to identify specific tremor aetiology.