Alterations of the proton-T2 time in relaxed skeletal muscle induced by passive extremity flexions

Journal of Magnetic Resonance Imaging : JMRI
Jens RumpIngolf Sack

Abstract

To demonstrate reciprocal changes of the apparent proton-T2 time in the biceps and triceps due to passive contraction and extension of the muscle fibers. The contraction state of the upper arm muscles of six healthy volunteers was passively changed by alternating the forearm position between the straight-arm position and an elbow flexion of 90 degrees. The relaxation of the muscle during passive contraction and extension was measured with the use of muscle electromyography (EMG) experiments. Spin-echo (SE) MRI with increasing echo times (TEs) of 12-90 msec was used to acquire the averaged signal decay of the segmented biceps and triceps. The apparent T2 was deduced using monoexponential least-square fitting. The median T2 alterations in biceps and triceps among all volunteers were found to be 1.2 and -1.3 msec in the straight and bent forearm positions, respectively. The confidence intervals (0.5 to 1.7 msec in biceps, and -2.6 to -1.1 msec in triceps) clearly indicate that proton-T2 in MR images is significantly (P < 0.05) prolonged with muscle contraction. The observed increase of the proton-T2 time was correlated with a passive contraction of skeletal muscle fibers. This passive effect can be attributed to changes in the int...Continue Reading

References

Oct 1, 1992·Journal of Applied Physiology·G R AdamsG A Dudley
Jul 1, 1992·Journal of Magnetic Resonance Imaging : JMRI·B T ArcherR M Peshock
Sep 1, 1991·Journal of Applied Physiology·J L FleckensteinR M Peshock
Apr 1, 1991·Investigative Radiology·E R WeidmanJ R MacFall
Aug 1, 1989·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·I K AdzamliT Sandor
Aug 1, 1988·AJR. American Journal of Roentgenology·J L FleckensteinR M Peshock
Jan 1, 1987·Magnetic Resonance Imaging·E Le RumeurP Rochcongar
Jul 1, 1994·Journal of Applied Physiology·G YueR M Enoka
Jun 1, 1993·Journal of Applied Physiology·J L FleckensteinR M Peshock
May 1, 1993·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·C SchwarzbauerA Haase
Oct 1, 1995·Journal of Applied Physiology·H A ChengL J Haseler
Jan 1, 1995·Magnetic Resonance Imaging·D Morvan, A Leroy-Willig
Dec 1, 1996·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·K M DonahueB R Rosen
May 1, 1997·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·L L Ploutz-SnyderR A Meyer
Sep 18, 1997·Journal of Applied Physiology·P A Hardy, G Yue
Jun 18, 1998·International Journal of Sports Medicine·R S RichardsonL J Haseler
Mar 31, 1999·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·M Narici
Jul 10, 1999·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G SaabG D Marsh
Apr 3, 2001·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·J A Stainsby, G A Wright
Sep 11, 2001·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·G GambarotaR V Mulkern
May 23, 2002·The American Journal of Sports Medicine·Yoshitsugu TakedaTakahiro Sasa
Feb 21, 2003·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Peter VermathenRoland Kreis
Feb 12, 1965·Science·C B BRATTONJ W WEINBERG
Jul 30, 2004·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Bénédicte F JordanBernard Gallez

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Citations

Jul 29, 2010·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Otto A SanchezBruce M Damon
Aug 9, 2006·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Sebastian PapazoglouIngolf Sack
Apr 3, 2008·Journal of Magnetic Resonance Imaging : JMRI·Masamitsu HatakenakaHiroshi Honda
Nov 28, 2019·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Felix SchrankIngolf Sack

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