PMID: 9422464Jan 9, 1998Paper

Application of stereophotogrammetry to total body three-dimensional analysis of human tremor

IEEE Transactions on Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
A CappelloA Bertani

Abstract

This work aims at verifying the possibility of investigating joint rotations, with amplitude and frequency ranges typical of pathological human tremor, using commercially available stereophotogrammetric systems together with signal processing techniques. A rotating disk is used as a mechanical tremor simulator to test the ability of the system to track known marker trajectories both in a large and a small calibrated volume. The performances of standard discrete Fourier transform (DFT) and autoregressive techniques are also evaluated and compared in the signal spectrum estimation. Results obtained from a pathological test subject and their dependence on the processing techniques adopted are also presented. The use of stereophotogrammetry and of the proposed signal spectrum estimation technique allow to quantify both frequency and amplitude content of three-dimensional (3-D) rotations of many human joints simultaneously and therefore to isolate the contribution of each joint to the whole body tremor.

References

Feb 1, 1989·Electroencephalography and Clinical Neurophysiology·M BacherH C Diener
May 1, 1987·Journal of Neurology, Neurosurgery, and Psychiatry·V HömbergH J Freund
May 1, 1983·Journal of Biomechanical Engineering·E S Grood, W J Suntay

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