猫眼外直肌的神经末稍

THE NERVE ENDINGS OF THE MUSCULUS RECTUS LATERALIS IN THE EYES OF THE CAT

作者在用石蜡镀银法染色的猫眼外直肌的切片中,观察到下列的结果:1.猫眼外直肌内有丰富的神经末梢。在单位面积中,神经末梢的数量比它的蚓状肌要多得多。2.猫眼外直肌运动终板的大小和形状有很大的差异。根据形状可分为叉状运动终板、树枝状运动终板、花瓣状运动终板和爪状运动终板四种类型。少数已有运动终板的肌纤维,尚接受副末梢的供给。3.和运动纤维伴行的细纤维,一部分是运动纤维的分支,它们参与运动终板的组成。有一些细纤维除开分支组成运动终板外,其本干穿出运动终板,末端形成梭状肿大,终止于其他的肌纤维。4.猫眼外直肌的两端,紧靠肌腱的附近,存在着少数形态较简单没有结缔组织膜包被的肌膜。5.猫眼外直肌内有很丰富的感觉末梢。葡萄状感觉末梢的数量最多,是眼外直肌最主要的本体感觉末梢;并且还有少量的肌梭和螺旋状感觉末梢。在结缔组织中,有游离感觉末梢、丝球状感觉末梢、树枝状感觉末梢和芽状感觉未梢。6.Marsland,Glees和Erikson的石蜡镀银法,是一个较简便而稳定的神经末梢的染色法。

Serial sections of musculus rectus lateralis in the eyes of the cat,stained with Glee’s silver imp-regnation for paraffin method,were used for this study.A great number of nerve endings were found in the extrinsic eye muscles,far more than thosewhich found in the musculus lumbricales.A few muscle spindles were found.Near the tendon ofthis muscle.The spiral nerve endings and the grape-like endings were also found on the muscle fibers.A few arboreal sensory endings,sensory spools and free sensory endings could be located in the in-tramuscular connective tissue.The end-plates of the musculus rectus lateralis of the cat may be divided into four-types:the dichotomous end-plate,arboreal end-plate,flowr-like end-plate and claw-like end-plate.A few ultraterminal endings were likewise found in it.