Validation of portable muscle tone measurement device based on a motor-driven system

Jia-Jin Chen, Hsin Min Lee, Ying Zu Huang

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


As a component of upper motor neuron syndrome, assessment of abnormality in muscle tone, including spasticity and rigidity, is a routine clinical examination. The aim of this study is to extend a sophisticated motor-driven measurement system, developed in our previous research, as a validation platform for developing a portable muscle tone measurement system. The main features of hand-held muscle tone measurement device are small angular-rate sensor for recording stretch velocity and light air-bag cuff for measuring the pressure difference at two sides of the wrist. To test the validity, the measurements recorded from the portable device shows good correlation with that recorded from the motor-driven system after removing the gravitational effect. To differentiate the normal from abnormal muscle tone, the slope of stretch resistance versus position was used to differentiate the normal muscle tone from that of a parkinsonism. However, there several factors, including the application of air-bag, the air-filled pressure, and the stretch velocity, could affect the accuracy in using the hand-held device for muscle tone assessment.

Original languageEnglish
Article number55
Pages (from-to)1213-1215
Number of pages3
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology-Proceedings
Publication statusPublished - 2001 Jan 1

All Science Journal Classification (ASJC) codes

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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