Fractional anisotropy values of calf muscles in normative state after exercise: preliminary results.
Fractional anisotropy values of calf muscles in normative state after exercise: preliminary results.
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DOI：
10.2463/mrms.7.157
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
Y. Okamoto;A. Kunimatsu;S. Miki;M. Shindo;M. Niitsu;M. Minami
中科院分区：
文献类型：
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作者：
Y. Okamoto;A. Kunimatsu;S. Miki;M. Shindo;M. Niitsu;M. Minami
目的：我们测量了双侧小腿同时扫描的弥散张量（DT）图像的小腿肌肉各向异性分数（FA），并确定单侧运动负荷后数值的变化。方法对10名健康男性志愿者的双侧小腿进行DT成像，测量胫骨前肌、腓肠肌和比目鱼肌的FA。10个中的2个在其右小腿进行负荷运动;我们记录了运动后立即和24小时，72小时和1周后的FA值。结果：在休息时，20头小牛胫骨前肌的平均FA值为0.63+/-0.02，腓肠肌为0.56+/-0.05，比目鱼肌为0.57+/-0.04。方差分析（ANOVA）显示差异有统计学意义（P<0.001），Bonferroni事后检验显示胫前肌和腓肠肌（校正后P<0.01）与胫前肌和比目鱼肌（校正后P<0.01）之间差异有统计学意义。2名受试者的比目鱼肌和腓肠肌FA值在运动后立即下降，但在一周后逐渐恢复到基线。结论该方法可用于评估肌肉疲劳相关的最小肌肉损伤。
PURPOSE We measured fractional anisotropy (FA) of calf muscles from diffusion tensor (DT) images from simultaneous scanning of bilateral calves and determined changes in values after unilateral exercise loading. METHOD We obtained DT images of both calves of 10 healthy male volunteers and measured FA of the anterior tibialis, gastrocnemius, and soleus muscles. Two of the ten were subjected to loaded exercise in their right calves; we recorded FA values immediately after exercise and 24 hours, 72 hours, and 1 week later. RESULTS At rest, the mean FA values of the 20 calves were 0.63+/-0.02 in the anterior tibialis, 0.56+/-0.05 in the gastrocnemius, and 0.57+/-0.04 in the soleus muscles. The differences were statistically significant (P<0.001) by analysis of variance (ANOVA), and differences between anterior tibialis and gastrocnemius (corrected P<0.01) and anterior tibialis and soleus (corrected P<0.01) muscles were significant by Bonferroni post hoc test. The FA values of the exercise-loaded soleus and gastrocnemius muscles of the 2 volunteers decreased just after exercise but gradually recovered to the baseline after one week. CONCLUSION Our method may be useful for assessing minimal muscle damage related to muscle fatigue.