Evaluation of a wearable orthosis and an associated algorithm for tremor suppression

Mario Manto*, Eduardo Rocon, Jose L Pons, Juan Manuel Belda, Stephane Camut

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

We describe a wearable orthosis and an associated algorithm for the simultaneous assessment and treatment of essential tremor, one of the most common movement disorders in humans involving an overactivity of the olivo-cerebellar pathways. A motor providing effective viscosity is fixed on a wearable orthosis in the upper limbs. The motor is controlled by a personal computer with software processing in real time the position and rate of rotation of the joint detected by a chip gyroscope. The orthosis can be used in a monitoring mode and in an active mode. The range of tremor suppression of the signals above the orthosis operational limit ranges from about 3% (percentile 5) to about 79% (percentile 95) in relation to energy in the monitoring mode. Considering both postural and kinetic, the mean tremor energy decreased from 55.49 ± 22.93 rad2 s-3 in the monitoring mode to 15.66 ± 7.29 rad2 s-3 in the active mode. Medians of power reduction were below 60% for the wrist and the elbow. In addition to supplying new information on the interactions between kinematics, dynamics and tremor genesis, this non-invasive technique is an alternative to current therapies. This new approach will provide new insights into the understanding of motor control.

Original languageEnglish (US)
Article number007
Pages (from-to)415-425
Number of pages11
JournalPhysiological Measurement
Volume28
Issue number4
DOIs
StatePublished - Apr 1 2007

Keywords

  • Cerebellum
  • Essential tremor
  • Human
  • Orthosis
  • Robotics
  • Viscosity

ASJC Scopus subject areas

  • Biophysics
  • Physiology
  • Biomedical Engineering
  • Physiology (medical)

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