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Related Experiment Videos

Automatic stance-swing phase detection from accelerometer data for peroneal nerve stimulation.

A T Willemsen1, F Bloemhof, H B Boom

  • 1Department of Electrical Engineering, University of Twente, Enschede, The Netherlands.

IEEE Transactions on Bio-Medical Engineering
|December 1, 1990
PubMed
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Accelerometers can detect walking phases (stance and swing) for implantable peroneal nerve stimulators. This technology could integrate sensors and stimulators into a single device, improving gait analysis and treatment.

Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology
  • Biomechanics

Background:

  • Implantable peroneal nerve stimulators require accurate detection of walking phases.
  • Existing footswitch sensors have limitations for implantation.
  • Accelerometers offer a potential solution for detecting gait phases due to their implantable nature.

Purpose of the Study:

  • To evaluate accelerometers as detectors for the swing phase of walking.
  • To develop and test automatic detection algorithms for gait phases using accelerometer data.
  • To assess the feasibility of combining accelerometer sensors with peroneal nerve stimulators.

Main Methods:

  • Accelerometers were attached between the ankle and knee to calculate equivalent ankle joint acceleration.

Related Experiment Videos

  • Automatic detection algorithms based on cross-correlation were developed and tested.
  • Measurements were collected from healthy and hemiplegic subjects during walking.

    • Main Results:

    • Accelerometers successfully distinguished between stance and swing phases, producing reproducible signals.
    • Automatic detection algorithms achieved high accuracy, with only a few errors in push-off detection for healthy and hemiplegic subjects.
    • Using a single accelerometer below the knee yielded comparable results to ankle placement.

    Conclusions:

    • Accelerometers are effective for detecting walking phases (stance and swing).
    • The developed algorithms demonstrate high accuracy in identifying gait phases.
    • Single-accelerometer systems below the knee show promise for integrated implantable sensor-stimulator devices.