肌萎缩是临床常见体征。近年对肌萎缩的形态、生化、机能变化及病因方而进行了大量研究,取得了较大的进展,这些成就对临床工作有一定指导意义。一、骨胳肌纤维的超微结构与生化横纹肌细胞(肌纤维)主要由肌膜、肌浆、肌原纤维和细胞核组成(见表1)。 Muscular atrophy is a common clinical sign. In recent years, a great deal of research has been done on the morphological, biochemical, functional and etiological factors of muscle atrophy, and great progress has been made. These achievements are of guiding significance to clinical work. First, the skeletal muscle fiber ultrastructure and biochemical striated muscle cells (muscle fibers) mainly by the sarcolemma, sarcopenia, myofibrils and nuclei (see Table 1).