胸骨舌骨肌的构筑学和肌内神经的研究

Distribution of intramuscular nerves and muscular architecture in human sternohyoid

目的为胸骨舌骨肌的临床应用提供形态学资料。方法大体解剖法、肌构筑法、改良Sihler’s染色法。结果 1胸骨舌骨肌肌重(7.71±0.78)g,肌长(8.20±0.93)cm,肌纤维长(6.71±0.63)cm,羽状角0°,肌生理横切面积(1.27±0.08)cm2。2支配胸骨舌骨肌的神经来自颈袢神经发出的2条一级上、下神经分支从肌外侧入肌,该神经分支入肌后分别发出数条次级分支,呈树枝样分布于上、下半段中央部,上、下段神经之间没有吻合。结论 1胸骨舌骨肌倾向速度型设计。2胸骨舌骨肌上、下两部分具有独立的神经支配,神经密集区位于上、下段中央部。

Objective To reveal morphologic features of human sternohyoid for clinical application. Methods Modified Sihler＇ s staining, muscle architecture method, gross anatomy method were used. Results （1）Muscle weight （7.71±0.78） g, muscle fiber length （6.71±0.63） cm, fiber length （8.20±0.93）, permation angle （0）°, and physiologic cross sectional area： （1.27±0.08） cm^2. （2）The nerves of the sternohyoid mainly derived from the ansa cervical, and it divided into two branches. The upper and lower branches that respectively went into the muscle from the lateral aspect. Conclusion （1）Stemohyoid is planus in human, implying a design towards high speed production. （2）The sternohyoid muscle has independent innervations of upper and lower two parts.