Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

NMES-assisted standing model from varied seated postures.

Jason C Gillette1, Catherine A Stevermer, Shashank Raina

  • 1Department of Health and Human Performance, Iowa State University, Ames, IA 50011-1160, USA.

Biomedical Sciences Instrumentation
|May 12, 2004
PubMed
Summary

Optimizing initial seated postures using neuromuscular electrical stimulation (NMES) can significantly reduce the hand-support forces required for standing after spinal cord injury (SCI). Specific knee and hip flexion angles are key to minimizing forces and preventing walker instability.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Iliotibial band strain while running around a curve.

Sports biomechanics·2025
Same author

Novel Combination of a 1.4mm Radiofrequency Ablation Catheter with Ultrathin Bronchoscope for Subpleural Peripheral Lung Tumour Ablation.

Respiration; international review of thoracic diseases·2025
Same author

Electromyography-based fatigue assessment of an upper body exoskeleton during automotive assembly.

Wearable technologies·2024
Same author

Effect of gait types and external weight carrying strategies on the femoral neck strains during stair descent.

PloS one·2023
Same author

Dual tasking increases kinematic and kinetic risk factors of ACL injury.

Sports biomechanics·2023
Same author

Apparent diffusion coefficient and T2* mapping on 3T MRI in normal and degenerative lumbar intervertebral discs.

Polish journal of radiology·2023

Area of Science:

  • Biomedical Engineering
  • Rehabilitation Science
  • Biomechanics

Background:

  • Spinal cord injury (SCI) impairs mobility, necessitating assistive technologies for functional recovery.
  • Neuromuscular electrical stimulation (NMES) can activate muscles, but significant hand-support is often needed for sit-to-stand transitions.
  • Reducing hand-support forces is crucial for safety and independence during standing.

Purpose of the Study:

  • To identify initial seated postures that minimize vertical hand-support forces during NMES-assisted sit-to-stand.
  • To ensure anterior/posterior hand-support forces remain below thresholds that could cause walker instability.
  • To investigate the role of specific muscle activation (vastus lateralis, semimembranosus) in reducing support requirements.

Main Methods:

Related Experiment Videos

  • Development and expansion of a multi-segment biomechanical model.
  • Simulation of various initial seated postures by altering knee and hip flexion angles.
  • Analysis of predicted vertical and anterior/posterior hand-support forces for vastus lateralis and combined vastus lateralis/semimembranosus stimulation.

Main Results:

  • Vastus lateralis stimulation predicted lowest vertical hand-support forces (63-66% body weight) at initial knee flexion of 70-74 and 110 degrees.
  • Combined vastus lateralis and semimembranosus stimulation predicted lowest vertical hand-support forces (2-10% body weight) at knee flexion of 70-82 degrees.
  • Initial hip flexion above 110 degrees was necessary to prevent walker tipping with combined muscle stimulation.

Conclusions:

  • Specific initial seated postures, particularly involving knee and hip flexion, can substantially reduce hand-support forces for NMES-assisted standing.
  • Hip extensor torque generated by semimembranosus stimulation is critical for minimizing vertical support needs.
  • Monitoring hand-support forces during NMES training is vital to prevent unsafe conditions, and future models should explore optimal muscle stimulation timing.