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

A probe for measuring current density during magnetic stimulation.

G Tay1, M A Chilbert, J Battocletti

  • 1Department of Neurosurgery, Medical College of Wisconsin, Milwaukee.

Biomedical Instrumentation & Technology
|May 11, 1991
PubMed
Summary
This summary is machine-generated.

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

Quantifying the effectiveness of ultraviolet-C light at inactivating airborne Mycobacterium abscessus.

The Journal of hospital infection·2022
Same author

Functional biomechanics of the thoracolumbar vertebral cortex.

Clinical biomechanics (Bristol, Avon)·2013
Same author

Studies of vehicular padding materials.

Annual proceedings. Association for the Advancement of Automotive Medicine·2001
Same author

Comparison of biomechanical head-neck responses of hybrid III dummy and whole body cadaver during inverted drops.

Biomedical sciences instrumentation·2001
Same author

Biomechanical analysis of injury criterion for child and adult dummies.

Critical reviews in biomedical engineering·2000
Same author

An investigation of hybrid III and living human drop tests.

Critical reviews in biomedical engineering·2000
Same journal

Improving Sterile Processing Operational Efficiency through Organizational Change.

Biomedical instrumentation & technology·2026
Same journal

Detecting Secondary Medication Infusion Errors via Spectrophotometry.

Biomedical instrumentation & technology·2026
Same journal

Inactivation of Endotoxin by Moist Heat, Electron Beam, and Gamma Irradiation.

Biomedical instrumentation & technology·2026
Same journal

Biological Indicators and Process Challenge Devices for Nitrogen Dioxide Sterilization.

Biomedical instrumentation & technology·2026
Same journal

Laparoscopic Instrument Defect Detection: A Prospective, Multisite Study.

Biomedical instrumentation & technology·2026
Same journal

Impact of Leadership Structures on Sterile Processing Performance and Patient Safety.

Biomedical instrumentation & technology·2026
See all related articles

This study measured induced current density in tissue during magnetic stimulation. Direct measurement is possible and crucial for designing effective magnetic stimulation systems for neural evaluation.

Area of Science:

  • Biophysics
  • Neuroscience
  • Biomedical Engineering

Background:

  • Time-varying magnetic fields induce currents in conductive tissues, potentially causing stimulation.
  • Magnetic stimulation is used for neural diagnostics, but the required current levels are unknown.
  • Accurate measurement of induced current density is essential for optimizing magnetic stimulation.

Purpose of the Study:

  • To develop and validate a method for measuring induced current density in tissue from pulsed magnetic fields.
  • To compare in vitro and in vivo measurements with theoretical models.
  • To investigate factors influencing current density in biological tissues.

Main Methods:

  • Developed a current-density probe for in vitro and in vivo measurements.

Related Experiment Videos

  • Used saline solutions at varying concentrations and anesthetized cat brains.
  • Employed two magnetic stimulation systems with different coil sizes and current waveforms.
  • Compared experimental measurements with theoretical calculations for a semi-infinite medium.

    • Main Results:

    • Measured current densities in saline agreed within 5% of theoretical calculations.
    • In vivo measurements in cat brains showed a 67% decrease compared to theoretical models.
    • The variance in brain measurements was attributed to the finite dimensions of the skull.

    Conclusions:

    • Direct measurement of induced current density in biological tissues is feasible.
    • Skull boundaries significantly affect current density distribution, deviating from theoretical models.
    • This methodology will inform the development of more effective magnetic stimulation devices.