Changes in T₂-weighted MRI of supinator muscle, pronator teres muscle, and extensor indicis muscle with manual muscle testing

• Yoshida Kazuya

  Department of Regulatory Physiology, Dokkyo Medical University School of Medicine: 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293, Japan Department of Rehabilitation, Faculty of Health Sciences, University of Human Arts and Sciences, Japan

• Akiyama Sumikazu

  Department of Regulatory Physiology, Dokkyo Medical University School of Medicine: 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293, Japan Department of Rehabilitation, Faculty of Health Sciences, University of Human Arts and Sciences, Japan

• Takamori Masayoshi

  Department of Regulatory Physiology, Dokkyo Medical University School of Medicine: 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293, Japan Department of Physical Therapy, Aoi Medical Academy, Japan

• Otsuka Hiroshi

  Department of Rehabilitation, Faculty of Health Sciences, University of Human Arts and Sciences, Japan

• Seo Yoshiteru

  Department of Regulatory Physiology, Dokkyo Medical University School of Medicine: 880 Kitakobayashi, Mibu-machi, Shimotsuga-gun, Tochigi 321-0293, Japan

Abstract

[Purpose] In order to detect muscle activity with manual muscle testing, T₂-weighted magnetic resonance (T_2w-MR) images were detected by a 0.2 T compact MRI system. [Subjects and Methods] The subjects were 3 adult males. Transverse T₂-weighted multi-slice spin-echo images of the left forearm were measured by a 39 ms echo-time with a 2,000 ms repetition time, a 9.5 mm slice thickness, 1 accumulation and a total image acquisition time of 4 min 16 s. First, T_2w-MR images in the resting condition were measured. Then, manipulative isometric contraction exercise (5 sec duration) to the supinator muscle, the pronator teres muscle or the extensor indicis muscle was performed using Borg’s rating of perceived exertion (RPE) scale of 15–17. The T_2w-MR images were measured immediately after the exercise. [Results] T_2w-MR image intensities increased significantly in the supinator muscle, the pronator teres muscle and the extensor indicis muscle after the exercise. However, the image intensities in the rest of the muscle did not change. [Conclusion] Using T_2w-MR images, we could detect muscle activity in a deep muscle, the supinator muscle, and a small muscle, the extensor indicis muscle. These results also support the reliability of the manual muscle testing method.

Journal

• Journal of Physical Therapy Science

  Journal of Physical Therapy Science 29 (3), 409-412, 2017

  The Society of Physical Therapy Science

Keywords

• Manual muscle test
• Magnetic resonance imaging
• Transverse relaxation time

Details

• CRID: 1390282679308499328
• NII Article ID: 130005464951
• DOI: 10.1589/jpts.29.409
• ISSN: 21875626
• ISSN: 09155287
• Web Site: https://www.jstage.jst.go.jp/article/jpts/29/3/29_jpts-2016-896/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2018092620
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed