论文部分内容阅读
目的 比较支配肩胛下肌及其拮抗肌的神经在臂丛根 (干 )部的来源 ,观察肩胛下肌营养动脉的来源及其在肌肉内的分布特点 ,为阐明产瘫肩胛下肌挛缩的发生机制提供解剖学基础。方法 对 3 2侧成人尸体的肩胛下肌及其拮抗肌的支配神经作逆行显微解剖分离 ,追踪其神经根 (干 )来源 ,计算来自臂丛各根 (干 )部分的构成比均值 ;观察肩胛下肌的动脉血供以比较肩胛下肌上部和下部血管数量和分布的差异。结果 支配肩胛下肌支配神经的纤维主要来源于臂丛上中干 ,上干占 (81.61± 6.85 ) % ,中干占(18.3 9± 6.85 ) % ;而支配拮抗肌的神经纤维全部来源于上干。自肩胛下肌上部进入的营养动脉在数量和口径上都大于下部 (t1=2 .94,P <0 .0 1;t2 =4.78,P <0 .0 1)。结论 肩胛下肌和其拮抗肌的支配神经在臂丛根 (干 )来源上的差别及肩胛下肌的血供特点是产瘫患儿肩胛下肌挛缩的主要原因
Objective To compare the sources of the brachial plexus root (stem) and the nerves that dominate the subscapularis muscle and its antagonist muscle, to observe the source of the subscapular muscular artery and its distribution in the muscle. To elucidate the occurrence of SCC Mechanisms provide anatomical basis. Methods Retrograde microdissection was performed on the dorsal scapulae and its antagonist muscle dominant nerves in 32 adult corpses. The source of the nerve root (stem) was traced and the constituent ratios of all the stems (stems) from the brachial plexus were calculated. The arterial blood of the subscapularis muscle was used to compare the number and distribution of the upper and lower scapular muscles. Results The fibers that dominate the subscapularis muscle predominantly originated from the upper and middle trunk of the brachial plexus, with the upper trunk accounting for (81.61 ± 6.85)% and the middle trunk accounting for (18.3 9 ± 6.85)%, while the nerve fibers governing the antagonist muscle were all derived from dry. The number of vegetative arteries entering the upper part of the subscapularis muscle was greater than the lower part in volume and caliber (t1 = 2.94, P <0.01; t2 = 4.78, P <0.01). Conclusions The differences in the origin of brachial plexus (stem) and the subscapularis blood supply characteristics of the dominant nerve of the subscapularis muscle and its antagonist muscle are the main causes of SCC in children with paralysis