人翼外肌肌内神经肌梭的分布及其意义  

Distribution of intramuscular nerves and spindles in human lateral pterygoid muscle

作　　者：张跃蓉[1] 刘静[2] 

机构地区：[1]遵义医学院口腔解剖生理学教研室,贵州遵义563003 [2]暨南大学医学院口腔系,广州510630

出　　处：《中国临床解剖学杂志》2007年第5期525-527,共3页Chinese Journal of Clinical Anatomy

基　　金：贵州省科学技术基金资助(20003039);暨南大学引进优秀人才科研启动基金(51205036)

摘　　要：目的:研究人翼外肌肌内神经和肌梭配布特征,以期深入了解翼外肌上、下头的功能特性。方法:对10具成人尸体的翼外肌肌梭以及肌内神经分支、分布进行了观察。结果:改良Sihler氏神经染色显示翼外肌上、下头有各自独立的神经支。支配翼外肌上头的神经支较短而细小,入肌后分出两个次级分支,与肌纤维排列方向成一定的角度向肌止点处走行;支配下头的神经支较粗,入肌后在肌纤维之间迂曲走行,发出呈树支状的多个次级分支,分支间无吻合。翼外肌肌梭仅分布在上头肌腹中央,下头未发现肌梭。结论:翼外肌具有划分亚部的形态学特征,每一亚部作为一个功能独立体在整肌功能中行使作用。Objective： To study the distribution features of intramuscular nerves and spindles in human lateral pterygoid muscle.Methods： Ten cadaveric heads were used. The branch patterns and distributions of the intramuscular nerves and spindles were observed on lateral pterygoid muscle treated with sihler＇ s neural staining and HE staining. Results： The nerve reached to lateral pterygoid muscle arose from the branch of the mandibular division of the trigeminal nerve as it appeared between the two heads of the muscle. Those nerves entered each head separately and ran With the muscle fibres toward the insertion of the muscle into the neck of the mandible and ramified many arborizations on their way. The spindles of the lateral pterygoid commonly clustered in middle belly of the superior head. Conclusions： These results indicate the lateral pterygoid muscle can be divided into second compartments, which plays a role in the muscle activity as a single motor-unit.

关 键 词：翼外肌 肌内神经 肌梭 人 

分 类 号：R323[医药卫生—人体解剖和组织胚胎学] R780.1[医药卫生—基础医学]