Haptic simulation of elbow joint spasticity

David I. Grow, Mengnan Wu, Michael J. Locastro, Sugandha K. Arora, Amy J Bastian, Allison M. Okamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Spasticity is a human motor system disorder in which reflexive muscle activity becomes unregulated, causing unwanted contractions that can interfere with voluntary movement. We present a simulator that replicates spastic arm dynamics for clinical training of physical therapists and neurologists. Accurate clinical assessment of spasticity is critical in the determination of patient treatment, although physical evidence of spasticity is often confused with that of related neuromuscular disorders. By repeatably simulating different levels of spastic severity, we hope to improve clinician training for rating spasticity and consequently decrease the variability of ratings between raters and within raters. Our haptic device, designed to replicate the spastic elbow of a child, uses a brake actuator and high-resolution optical encoder. Two competing spasticity models from the literature are implemented. Preliminary experiments indicate that the decreased stretch reflex threshold model is more realistic than the increased stiffness model. The simulator improves on training with patients, since spastic severity can be readily adjusted under controlled and repeatable conditions.

Original languageEnglish (US)
Title of host publicationSymposium on Haptics Interfaces for Virtual Environment and Teleoperator Systems 2008 - Proceedings, Haptics
Pages475-476
Number of pages2
DOIs
Publication statusPublished - 2008
EventSymposium on Haptics Interfaces for Virtual Environment and Teleoperator Systems 2008 - Haptics - Reno, NV, United States
Duration: Mar 13 2008Mar 14 2008

Other

OtherSymposium on Haptics Interfaces for Virtual Environment and Teleoperator Systems 2008 - Haptics
CountryUnited States
CityReno, NV
Period3/13/083/14/08

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Keywords

  • B.4.m [hardware]: general
  • H.5.2 [information interfaces and presentation]: user interfaces - haptic I/O
  • J.2 [computer applications]: physical sciences and engineering-engineering
  • J.3 [computer applications]: life and medical sciences - health

ASJC Scopus subject areas

  • Artificial Intelligence
  • Human-Computer Interaction
  • Control and Systems Engineering

Cite this

Grow, D. I., Wu, M., Locastro, M. J., Arora, S. K., Bastian, A. J., & Okamura, A. M. (2008). Haptic simulation of elbow joint spasticity. In Symposium on Haptics Interfaces for Virtual Environment and Teleoperator Systems 2008 - Proceedings, Haptics (pp. 475-476). [4479997] https://doi.org/10.1109/HAPTICS.2008.4479997