RT Journal Article
T1 Spontaneous mechanical and electrical activities of human calf musculature at rest assessed by repetitive single-shot diffusion-weighted MRI and simultaneous surface electromyography
A1 Schwartz, Martin
A1 Steidle, Günter
A1 Martirosian, Petros
A1 Ramos-Murguialday, Ander
A1 Preißl, Hubert
A1 Stemmer, Alto
A1 Yang, Bin
A1 Schick, Fritz
AB Purpose: Assessment of temporal and spatial relations between spontaneous mechanical activities in musculature (SMAM) at rest as revealed by diffusion-weighted 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. Methods: Series of diffusion-weighted stimulated echo planar imaging were recorded with concurrent sEMG measurements. Electrical activities in sEMG were analyzed by non-parametric Friedman and two-sample Kolmogorov–Smirnov test. Direct correlation of both modalities was investigated by temporal mapping of electrical activity in sEMG to DWI repetition interval. Results: Electrical activities in sEMG and number of visible SMAMs in DWI showed a strong correlation (ρ = 0.9718). High accordance between sEMG activities and visible SMAMs in DWI in a near-surface region around sEMG electrodes was achieved. Characteristics of sEMG activities were almost similar under varying magnetic field conditions. Conclusion: Visible SMAMs in DWI have shown a close and direct relation to concurrent signals recorded by sEMG. MR-related 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-invasive tools for studying physiology and pathophysiology of spontaneous activities in resting muscle. Magn Reson Med 79:2784–2794, 2018.
SN 0740-3194
YR 2018
FD 2018-05
LK https://hdl.handle.net/11556/4032
UL https://hdl.handle.net/11556/4032
LA eng
NO Schwartz , M , Steidle , G , Martirosian , P , Ramos-Murguialday , A , Preißl , H , Stemmer , A , Yang , B & Schick , F 2018 , ' Spontaneous mechanical and electrical activities of human calf musculature at rest assessed by repetitive single-shot diffusion-weighted MRI and simultaneous surface electromyography ' , Magnetic Resonance in Medicine , vol. 79 , no. 5 , pp. 2784-2794 . https://doi.org/10.1002/mrm.26921
NO Publisher Copyright: © 2017 International Society for Magnetic Resonance in Medicine
DS TECNALIA Publications
RD 1 ago 2024