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

H-reflex changes under spinal loading and unloading conditions in normal subjects.

A A Ali1, M A Sabbahi

  • 1Texas Woman's University, School of Physical Therapy, 1130 M.D. Anderson Blvd., Houston, TX 77030-2897, USA.

Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology
|March 23, 2000
PubMed
Summary

Spinal loading affects soleus H-reflex amplitude, with inhibition observed during standing, loading, and unloading compared to lying. H-reflex latency remained unchanged, suggesting functional testing may reveal root impingement.

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

An enhanced energy management framework based on artificial gorilla troops for optimal operation of grid-connected multi-nanogrids.

Scientific reports·2026
Same author

Corrigendum to "DNA vaccination for cervical cancer; a novel technology platform of RALA mediated gene delivery via polymeric microneedles" [Nanomed Nanotechnol Biol Med 10.1016/j.nano.2016.11.019 [pubmed: 27979747 issn: 1549-9634]].

Nanomedicine : nanotechnology, biology, and medicine·2026
Same author

A settingless fault detection approach for MVDC network.

Scientific reports·2026
Same author

WITHDRAWN: DNA vaccination for cervical cancer; a novel technology platform of RALA mediated gene delivery via polymeric microneedles.

Nanomedicine : nanotechnology, biology, and medicine·2026
Same author

Drying Spring Accelerates Transitions Toward Pyrogenic Vegetation in Eastern Boreal North America.

Ecology letters·2025
Same author

Two-stage multi-objective framework for optimal operation of modern distribution network considering demand response program.

Scientific reports·2025

Area of Science:

  • Neuroscience
  • Biomechanics
  • Clinical Electrophysiology

Background:

  • The soleus H-reflex is a standard clinical measure for neurological assessment.
  • Spinal loading conditions vary significantly between prone lying and upright postures.
  • Current clinical H-reflex testing typically uses a prone position, potentially not reflecting functional states.

Purpose of the Study:

  • To investigate the impact of different spinal loading conditions on soleus H-reflex parameters.
  • To determine if mechanical loading affects H-reflex amplitude and latency.

Main Methods:

  • Twenty healthy volunteers underwent H-reflex testing using electromyography.
  • Soleus H-reflex was elicited via tibial nerve stimulation in the popliteal fossa.
  • Subjects were tested in four conditions: prone lying, standing, standing with 20% body weight load, and standing unloaded by 25% body weight.

Related Experiment Videos

Main Results:

  • H-reflex amplitude was significantly inhibited in standing, loaded, and unloaded conditions compared to prone lying.
  • H-reflex amplitude recovered during loading compared to standing.
  • No significant changes in H-reflex latency were observed across the four conditions.

Conclusions:

  • Spinal loading influences H-reflex amplitude, indicating interplay between peripheral and central nervous system mechanisms.
  • H-reflex testing under functional conditions like standing may enhance detection of subtle nerve root impingement.