長時間の電気刺激によるウサギ下腿三頭筋の疲労特性 : MR画像による評価法

概要

論文の詳細を見る
In Functional Electrical Stimulation (FES), muscle fatigue is an important factor which determines the recovery or restoration of the motor function. We studied if the magnetic resonance imaging (MRD was useful for evaluating the muscle fatigue. Subjects were seven male rabbits (white Japanese). Their tibial nerves were electrically stimulated, and the triceps surae were observed with MRI. Basically, two-minute electrical stimulation was followed by 20-second rest. The basic sequence was repeated 15 times. The whole repetition was defined as one unit of stimulation. After each unit, T1 and T2 weighted images were taken, and the process was repeated five times. On the T2 weighted images, the signal intensity increased thoughout the whole units. Especially, it was strongest in the second unit, while the change rate was positive between the first and the second units and negative between the second and the fourth units. The increase in the signal intensity may be related to the amount of water in the tissue, which may be caused by transudation of water from blood vessels during the contraction of the muscle. The decrease in the signal intensity after the second unit may be due to a change in the tissue water composition. These results suggest that it is useful for evaluating the muscle fatigue to observe the sequential change in the signal intensity of muscle MRI both qualitatively and quantitatively.Functional Electrical stimulationmuscle fatiguemagnetic resonance imaging
東北大学の論文
2004-07-31

長時間の電気刺激によるウサギ下腿三頭筋の疲労特性 : MR画像による評価法

スポンサーリンク

概要

著者

関連論文

スポンサーリンク