Martin T P, Gundersen L A, Blevins F T, Coutts R D
Faculty of Rehabilitation Medicine, University of Alberta, Canada.
Scand J Rehabil Med. 1991;23(4):207-10.
The influence of functional electrical muscle stimulation (FES) on selected properties of vastus lateralis muscle fibres was studied in patients recovering from total knee arthroplasty for osteoarthritis. Prior to surgery, on the average, muscle biopsies from the vastus lateralis could be characterized as having a predominance of Type I fibres which were significantly larger in cross-sectional area than the Type II fibres in the same sample. Following surgery, muscle biopsies from a group of patients (n = 7) which received continuous passive motion and no FES, exhibited a marked increase in the proportion of Type II fibres along with a general atrophy of both the Type I and Type II fibres. Patients receiving passive motion and FES (n = 9) also showed an increase in the relative percentage of Type II fibres. Post-operatively, however, there was no significant reduction in fibre area in the stimulated muscles. These data suggest that FES was effective in attenuating the muscle atrophy associated with total knee arthroplasty but had no influence on those metabolic properties which were related to muscle fibre type classification criteria.
在因骨关节炎接受全膝关节置换术并处于恢复阶段的患者中，研究了功能性电刺激（FES）对股外侧肌纤维选定特性的影响。术前，股外侧肌的肌肉活检平均而言可被描述为以I型纤维为主，其横截面积明显大于同一样本中的II型纤维。术后，一组接受持续被动运动且未接受FES的患者（n = 7）的肌肉活检显示，II型纤维的比例显著增加，同时I型和II型纤维普遍萎缩。接受被动运动和FES的患者（n = 9）也显示II型纤维的相对百分比增加。然而，术后受刺激肌肉的纤维面积没有显著减小。这些数据表明，FES在减轻与全膝关节置换术相关的肌肉萎缩方面是有效的，但对那些与肌纤维类型分类标准相关的代谢特性没有影响。
