Postural research and rehabilitation in an immersive virtual environment

E. A. Keshner, R. V. Kenyon, Y. Dhaher

Research output: Contribution to journalConference article

13 Scopus citations

Abstract

We have united an immersive dynamic virtual environment with motion of a posture platform to record biomechanical and physiological responses to combined visual, vestibular, and proprioceptive inputs. A 6 degree-of-freedom force plate provides measurements of moments exerted on the base of support. Kinematic data from the head, trunk, and lower limb is collected using 3-D video motion analysis. The virtual image is projected via a stereo-capable projector mounted behind the back-projection screen. This system allows us to explore complex behaviors necessary for rehabilitation. We are currently examining how a dynamic visual field affects posture and spatial orientation, and whether visual task demands interfere with our ability to react to a loss of balance in healthy adults and in adults with labyrinthine deficit Our data suggest that when there is a confluence of meaningful inputs, none of the inputs are suppressed in healthy adults; the postural response is modulated by all existing sensory signals in a non-additive fashion. Labyrinthine deficient adults suppress visual inputs. Individual perception of the sensory structure also appears to be a significant component of the postural response in these protocols. We will discuss the implications of these results for the design of clinical interventions for balance disorders.

Original languageEnglish (US)
Pages (from-to)4862-4865
Number of pages4
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume26 VII
StatePublished - Dec 1 2004
Externally publishedYes
EventConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 - San Francisco, CA, United States
Duration: Sep 1 2004Sep 5 2004

Keywords

  • Labyrinthine deficit
  • Multisensory weighting
  • Posture
  • Virtual reality
  • Vision

ASJC Scopus subject areas

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

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