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In electrophysiological diagnosis, muscle signals, also called compound muscle action potentials (CMAP), are usually recorded on the body surface with surface electrodes
This article successfully carried out average and non-average magnetic measurements on the muscles innervated by peripheral nerves (abductor pollicis brevis)
This article successfully carried out average and non-average magnetic measurements on the muscles innervated by peripheral nerves (abductor pollicis brevis)
A typical representative biomagnetic field generated by a neuroelectric dipole source (neuron or muscle tissue)
The stimulation electrode is located at the location of the median nerve of the subject
Use OPM (4×QZFM zero field magnetometer) to measure magnetic induction in a passive magnetic shielded room to reduce external distortion
Magnetogram measurement
OPM measurement shows that the average OPM amplitude response at 300Hz is about -8dB, and the linear attenuation steepness from 100 to 450Hz is about -0.
For the accurate diagnosis of neuromuscular diseases, without any electrical stimulation application, it is very valuable to use single fiber EMG to identify the firing rate and signal shape behavior of contracted muscle fibers
Magnetoencephalogram and magnetocardiogram (MCG) are more suitable for clinical applications than electromyography
E.
Elzenheimer, H.
Laufs, W.
Schulte-Mattler and G.
Schmidt, " Magnetic Measurement of Electrically Evoked Muscle Responses With Optically Pumped Magnetometers ," inMagnetic Measurement of Electrically Evoked Muscle Responses With Optically Pumped Magnetometers IEEE Transactions on Neural Systems and Rehabilitation Engineering
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