肌萎缩为局限性或广泛性的肌容积缩小(即骨骼肌肉体积缩小),肌纤维数目减少或变细甚至消失,是神经科临床中常见的发生于任何年龄组的一种症状和体征。正常成人男性肌纤维直径为48～65微米,女性为33～53微米,若男性成人在35微米以下,女性成人在23微米以下,就能诊断为肌萎缩,常伴 Muscular atrophy is a limited or extensive muscle volume reduction (ie, skeletal muscle volume reduction), the number of muscle fibers to reduce or reduce or even disappear, is a neurological clinical common in any age group of symptoms and signs. Normal adult male muscle fiber diameter of 48 to 65 microns, women 33 to 53 microns, if the male adult below 35 microns, female adults below 23 microns, can be diagnosed with muscle atrophy, often with