The fascicle length was . ±.cm in sternal region, 9.±0.87cm in costal region, 8.8±.0cm in lateral cord, and .±.9cm in t胸骨部肌束长. ±.cm,肋部肌束长9.±O. 87cm,外侧束肌束长8.8±.0cm,膈脚肌束长.±.9cm。