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Peripheral Nerve Magnetoneurography With Optically Pumped Magnetometers.

Yifeng Bu¹, Jacob Prince¹, Hamed Mojtahed¹

¹Jacobs School of Engineering, Electrical and Computer Engineering, University of California San Diego, San Diego, CA, United States.

Frontiers in Physiology

|April 4, 2022

Summary

This summary is machine-generated.

Optically pumped magnetometers (OPMs) can now detect nerve signals like the Sensory Nerve Action Potential (SNAP) and Hoffmann Reflex (H-Reflex). This breakthrough expands their use in diagnosing peripheral nerve diseases.

Keywords:

magnetoencephalography magnetoneurography magnetospinography optically pumped magnetometer sensory nerve action potentials super conducting quantum interference devices Η-Reflex

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Area of Science:

Neuroscience
Biophysics
Quantum Sensing

Background:

Electrodiagnosis is crucial for peripheral nerve disease assessment.
Conventional methods use surface electrodes to measure ionic currents and magnetic fields.
Optically pumped magnetometers (OPMs) offer high sensitivity but were limited by bandwidth.

Purpose of the Study:

To investigate if OPMs with expanded bandwidth can detect peripheral nerve action currents.
To assess OPMs' potential as a novel electrodiagnostic tool.

Main Methods:

Characterized the bandwidth of OPMs.
Hypothesized OPMs could detect compound action current signatures.
Confirmed OPMs' ability to detect magnetic signatures of SNAP and H-Reflex.

Main Results:

OPMs with expanded bandwidth successfully detected the magnetic signatures of both SNAP and H-Reflex.
Demonstrated OPMs' capability beyond cortical measurements.

Conclusions:

Expanded bandwidth OPMs show promise for peripheral nerve electrodiagnosis.
OPMs represent a potential emerging tool for clinical neurophysiology.