Two synergistic types of muscles were detected during forearm rotation exercise by T2 cumulative frequency curves using 0.2 T magnetic resonance imaging
Abstract The purpose of this study was the detection and characterization of synergistic muscle activity. Using T2-map MRI, T2 values for 10 forearm muscles in 11 healthy adult volunteers were obtained in the resting state and after isotonic forearm supination and pronation exercises with the elbow...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Journal of Physiological Sciences |
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| Online Access: | https://doi.org/10.1186/s12576-024-00920-9 |
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| author | Masayoshi Takamori Sumikazu Akiyama Yoshiteru Seo Takashi Mizushima |
| author_facet | Masayoshi Takamori Sumikazu Akiyama Yoshiteru Seo Takashi Mizushima |
| author_sort | Masayoshi Takamori |
| collection | DOAJ |
| description | Abstract The purpose of this study was the detection and characterization of synergistic muscle activity. Using T2-map MRI, T2 values for 10 forearm muscles in 11 healthy adult volunteers were obtained in the resting state and after isotonic forearm supination and pronation exercises with the elbow extended. T2 was normalized by Z = (T2e–T2r)/SDr, where T2e was T2 after exercise, while T2r and SDr were the reference values of 34 ms and 3 ms, respectively. Using the cumulative frequency curves of Z values (CFZ), we detected 2 and 3 synergistic muscles for supination and pronation, respectively, and divided these into 2 types, one activated by exercise strength dependently, and the other, independent of exercise strength, activated by only a smaller fraction of the participants. We also detected co-contraction for the supination. Thus, CFZ is a useful visualization tool to detect and characterize not only synergistic muscle, but also co-contraction muscle. |
| format | Article |
| id | doaj-art-c0f4986fd2e344f1afbd35d1310f9ba3 |
| institution | DOAJ |
| issn | 1880-6562 |
| language | English |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Physiological Sciences |
| spelling | doaj-art-c0f4986fd2e344f1afbd35d1310f9ba32025-08-20T03:23:24ZengElsevierJournal of Physiological Sciences1880-65622024-04-0174111110.1186/s12576-024-00920-9Two synergistic types of muscles were detected during forearm rotation exercise by T2 cumulative frequency curves using 0.2 T magnetic resonance imagingMasayoshi Takamori0Sumikazu Akiyama1Yoshiteru Seo2Takashi Mizushima3Department of Rehabilitation, Dokkyo Medical University School of MedicineDepartment of Health Sciences, Kochi Professional University of RehabilitationDivision of Cell Structure, National Institute for Physiological SciencesDepartment of Rehabilitation, Dokkyo Medical University School of MedicineAbstract The purpose of this study was the detection and characterization of synergistic muscle activity. Using T2-map MRI, T2 values for 10 forearm muscles in 11 healthy adult volunteers were obtained in the resting state and after isotonic forearm supination and pronation exercises with the elbow extended. T2 was normalized by Z = (T2e–T2r)/SDr, where T2e was T2 after exercise, while T2r and SDr were the reference values of 34 ms and 3 ms, respectively. Using the cumulative frequency curves of Z values (CFZ), we detected 2 and 3 synergistic muscles for supination and pronation, respectively, and divided these into 2 types, one activated by exercise strength dependently, and the other, independent of exercise strength, activated by only a smaller fraction of the participants. We also detected co-contraction for the supination. Thus, CFZ is a useful visualization tool to detect and characterize not only synergistic muscle, but also co-contraction muscle.https://doi.org/10.1186/s12576-024-00920-9KinesiologySkeletal muscleTransverse relaxation timeMRI |
| spellingShingle | Masayoshi Takamori Sumikazu Akiyama Yoshiteru Seo Takashi Mizushima Two synergistic types of muscles were detected during forearm rotation exercise by T2 cumulative frequency curves using 0.2 T magnetic resonance imaging Journal of Physiological Sciences Kinesiology Skeletal muscle Transverse relaxation time MRI |
| title | Two synergistic types of muscles were detected during forearm rotation exercise by T2 cumulative frequency curves using 0.2 T magnetic resonance imaging |
| title_full | Two synergistic types of muscles were detected during forearm rotation exercise by T2 cumulative frequency curves using 0.2 T magnetic resonance imaging |
| title_fullStr | Two synergistic types of muscles were detected during forearm rotation exercise by T2 cumulative frequency curves using 0.2 T magnetic resonance imaging |
| title_full_unstemmed | Two synergistic types of muscles were detected during forearm rotation exercise by T2 cumulative frequency curves using 0.2 T magnetic resonance imaging |
| title_short | Two synergistic types of muscles were detected during forearm rotation exercise by T2 cumulative frequency curves using 0.2 T magnetic resonance imaging |
| title_sort | two synergistic types of muscles were detected during forearm rotation exercise by t2 cumulative frequency curves using 0 2 t magnetic resonance imaging |
| topic | Kinesiology Skeletal muscle Transverse relaxation time MRI |
| url | https://doi.org/10.1186/s12576-024-00920-9 |
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