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

Reflex response changes during hyper and microgravity.

T Sato1, T Miyoshi, K Nakazawa

  • 1Motor Dysfunction Division, Research Institute, National Rehabilitation Center for the Disabled, Saitama, Japan.

Journal of Gravitational Physiology : a Journal of the International Society for Gravitational Physiology
|March 26, 2003
PubMed
Summary

This study quantified the H-reflex and motor evoked potentials (MEP) in the soleus muscle (SOL) during parabolic flight. Findings reveal how microgravity and hypergravity impact reflex activity and motor control.

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

H-reflex and motor evoked potential changes during head down bed rest.

Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology·2003
Same author

Effect of gravity change on the production of thrombopoietic growth factors.

Uchu Seibutsu Kagaku·2002
Same author

Warthin's tumor of parotid gland on Tc-99m pertechnetate scintigraphy with lemon juice stimulation: Tc-99m uptake, size, and pathologic correlation.

European radiology·2001
Same author

Gravity-dependent modulation of Ia afferent in human.

Journal of gravitational physiology : a journal of the International Society for Gravitational Physiology·2001
Same author

GIPC and GAIP form a complex with TrkA: a putative link between G protein and receptor tyrosine kinase pathways.

Molecular biology of the cell·2001
Same author

An ADP-ribosylation factor GTPase-activating protein Git2-short/KIAA0148 is involved in subcellular localization of paxillin and actin cytoskeletal organization.

Molecular biology of the cell·2001

Area of Science:

  • Neuroscience
  • Human Physiology
  • Space Medicine

Background:

  • The H-reflex and motor evoked potentials (MEP) are crucial for understanding neuromuscular function.
  • Previous research explored reflex activity during short-term space missions and parabolic flights.
  • Investigating reflex responses under varying gravity conditions is essential for space travel and terrestrial applications.

Purpose of the Study:

  • To quantitatively evaluate the H-reflex and MEP in the soleus muscle (SOL) during parabolic flight.
  • To analyze the impact of microgravity and hypergravity on reflex activity.
  • To understand the effects of altered gravity on motor control and neuromuscular adaptation.

Main Methods:

  • Utilized parabolic flight to simulate microgravity and hypergravity.

Related Experiment Videos

  • Measured the H-reflex and MEP in the SOL muscle.
  • Performed quantitative analysis of reflex responses under different gravitational conditions.

    • Main Results:

    • Observed significant changes in H-reflex amplitude and latency during microgravity and hypergravity phases.
    • MEP responses also showed alterations, indicating modulation of the corticospinal pathway.
    • Reflex activity was found to be sensitive to acute changes in gravitational load.

    Conclusions:

    • Gravity significantly influences H-reflex and MEP, affecting neuromuscular control.
    • These findings provide insights into human adaptation to altered gravitational environments.
    • Understanding these effects is critical for astronaut health and developing countermeasures.