{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T22:07:51Z","timestamp":1790892471629,"version":"4.1.0"},"reference-count":53,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2017,9,17]],"date-time":"2017-09-17T00:00:00Z","timestamp":1505606400000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Magnetic Resonance in Med"],"published-print":{"date-parts":[[2018,5]]},"abstract":"<jats:sec><jats:title>Purpose<\/jats:title><jats:p>Assessment of temporal and spatial relations between spontaneous mechanical activities in musculature (SMAM) at rest as revealed by diffusion\u2010weighted imaging (DWI) and electrical muscular activities in surface EMG (sEMG). Potential influences of static and radiofrequency magnetic fields on muscular activity on sEMG measurements at rest were examined systematically.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Series of diffusion\u2010weighted stimulated echo planar imaging were recorded with concurrent sEMG measurements. Electrical activities in sEMG were analyzed by non\u2010parametric Friedman and two\u2010sample Kolmogorov\u2013Smirnov test. Direct correlation of both modalities was investigated by temporal mapping of electrical activity in sEMG to DWI repetition interval.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Electrical activities in sEMG and number of visible SMAMs in DWI showed a strong correlation (\u03c1\u2009=\u20090.9718). High accordance between sEMG activities and visible SMAMs in DWI in a near\u2010surface region around sEMG electrodes was achieved. Characteristics of sEMG activities were almost similar under varying magnetic field conditions.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Visible SMAMs in DWI have shown a close and direct relation to concurrent signals recorded by sEMG. MR\u2010related magnetic fields had no significant effects on findings in sEMG. Hence, appearance of SMAMs in DWI should not be considered as imaging artifact or as effects originating from the special conditions of MR examinations. Spatial and temporal distributions of SMAMs indicate characteristics of spontaneous (microscopic) mechanical muscular action at rest. Therefore, DWI techniques should be considered as non\u2010invasive tools for studying physiology and pathophysiology of spontaneous activities in resting muscle. 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