Discrimination of finger movements by magnetomyography with optically pumped magnetometers

被引:1
|
作者
Greco, Antonino [1 ,2 ,3 ]
Baek, Sangyeob [1 ,2 ,3 ,4 ]
Middelmann, Thomas [5 ]
Mehring, Carsten [6 ,7 ]
Braun, Christoph [1 ,2 ,3 ]
Marquetand, Justus [1 ,2 ,3 ,8 ]
Siegel, Markus [1 ,2 ,3 ,9 ]
机构
[1] Univ Tubingen, Hertie Inst Clin Brain Res, Dept Neural Dynam & Magnetoencephalog, Tubingen, Germany
[2] Univ Tubingen, Ctr Integrat Neurosci, Tubingen, Germany
[3] Univ Tubingen, Meg Ctr, Tubingen, Germany
[4] Univ Trento, Ctr Mind Brain Sci, CIMeC, Rovereto, Italy
[5] Phys Tech Bundesanstalt PTB, Dept Biosignals, Berlin, Germany
[6] Univ Freiburg, Bernstein Ctr Freiburg, Freiburg, Germany
[7] Univ Freiburg, Fac Biol, D-79104 Freiburg, Germany
[8] Univ Tubingen, Hertie Inst Clin Brain Res, Dept Epileptol, Tubingen, Germany
[9] Univ Tubingen, German Ctr Mental Hlth DZPG, Tubingen, Germany
来源
SCIENTIFIC REPORTS | 2023年 / 13卷 / 01期
关键词
MAGNETIC-FIELDS; NOISE; EMG;
D O I
10.1038/s41598-023-49347-z
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Optically pumped magnetometers (OPM) are quantum sensors that offer new possibilities to measure biomagnetic signals. Compared to the current standard surface electromyography (EMG), in magnetomyography (MMG), OPM sensors offer the advantage of contactless measurements of muscle activity. However, little is known about the relative performance of OPM-MMG and EMG, e.g. in their ability to detect and classify finger movements. To address this in a proof-of-principle study, we recorded simultaneous OPM-MMG and EMG of finger flexor muscles for the discrimination of individual finger movements on a single human participant. Using a deep learning model for movement classification, we found that both sensor modalities were able to discriminate finger movements with above 89% accuracy. Furthermore, model predictions for the two sensor modalities showed high agreement in movement detection (85% agreement; Cohen's kappa: 0.45). Our findings show that OPM sensors can be employed for contactless discrimination of finger movements and incentivize future applications of OPM in magnetomyography.
引用
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页数:8
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