Orthostatic Tolerance during FES-evoked Stepping in Paraplegia: A Safety and Viability Study

Funded Activity Summary

In the past 30 years, there has been growing interest in the potential benefits of functional electrical stimulation (FES) of the paralysed leg muscles as a means of restoring movement in the lower limbs. FES uses electrical impulses generated by a stimulator to elicit purposeful muscle contractions via skin-surface electrodes placed over the muscles. Although traditionally limited to health-related activities such as stationary cycling exercise, recent bioengineering advances in the area of FES present the SCI person with a means of restoring upright mobility and reinstating functional tasks. Yet, while this technological innovation remains promising for optimising functional outcomes after SCI, there remains a distinct lack of knowledge of the physiological stresses placed upon the individual. In this preliminary safety and viability study, the physiological implications central to enhanced upright mobility will be investigated during FES-evoked prolonged stepping. The responses during FES-stepping will be contrasted with the responses observed during stepping performed without FES. The study will investigate the blood pressure responses during FES-gait, but also address possible physiological mechanisms underlying those blood pressure responses. The findings from this study will identify whether there is a phsiological limitation to the performance of FES-evoked functional mobility. Current physiotherapy practice recognises blood pressure control and orthostatic hypotension as a significant barrier to functional standing and stepping, yet little is known about the physiology underpinning the condition. If FES does present a limitation to the performance of upright functional activities, this study will also assist in devising alternative physiotherapy gait training regimens.

Funded Activity Details

Start Date: 01-01-2004

End Date: 01-01-2006

Funding Scheme: NHMRC Project Grants

Funding Amount: $244,900.00

Funder: National Health and Medical Research Council

Research Topics

ANZSRC Field of Research (FoR)

Rehabilitation And Therapy: Occupational And Physical

ANZSRC Socio-Economic Objective (SEO)

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Other Keywords

Control of the Blood Pressure | Exercise Physiology | Exercise Training | Functional Electrical Stimulation | Gait Training | Orthostatic Hypotension | Paraplegia | Physiotherapy | Rehabilitation

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