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不同哺乳动物下斜肌周围结缔组织的结构功能分析
目的 探讨哺乳类动物下斜肌周围结缔组织对眼球运动的作用.方法 实验研究.盐酸氯胺酮深度麻醉成年猕猴2只,成年兔、Wistar大鼠各5只,将所有眼眶分离,整体固定,每只动物任选1只眼眶行大体解剖,组织学染色眶进行全眶石蜡包埋,冠状位连续切片,相邻切片以Masson三色染色、Weigert染色法分别进行胶原纤维和弹力纤维染色.观察下斜肌周围结缔组织的形态、结构及其与眼外肌的组织关系.对下斜肌与下直肌间的胶原组织平均吸光度(A)值进行Games-Howell 统计学分析.结果 3种动物下斜肌周围结缔组织均与外直肌、下直肌周围结缔组织相延续,但延续方式并不完全相同.在猕猴,下斜肌周围结缔组织除与其自身眶层纤维、下直肌胶原环紧密相连外,还与外直肌胶原环相延续.兔及Wistar大鼠下斜肌虽然亦有胶原结缔组织纤维所绕,这一包绕的胶原纤维与外直肌周围结缔组织相延续,但与下直肌纤维环较疏松地连接.猕猴、兔及大鼠下斜肌与下直肌间胶原组织A值分别为0..2±0.5 ±0.0030.猕猴与后两者比较差异有统计学意义(F=0.025,0.024;P ＜0.05),兔与大鼠的差异有统计学意义(F=0.000,P＜0.05).结论 猕猴双眼集合运动时,下斜肌与下直肌、外直肌的纤维结缔组织联系可使这3条眼外肌的移动相互关联,从而参与调控复杂的集合运动.
Abstract：
Objective The purpose of this research lied in studying the structure and function of connective tissue of inferior oblique(IO) in rhesus,rabbit and rat.Methods It was an experimental study.Two adult monkeys(rhesus),five adult rabbits and five adult Wistar rats were involved in this study.The gross anatomy of an orbit in each animal was observed.Meanwhile,the fellow orbit was processed with paraffin imbedding and coronal serial section.Masson trichrome stain was used to distinguish muscle and collagen,and Weigert stain was performed for identification of elastin.Results The connective tissue around IO muscle in rhesus,rabbits and rats all connected with inferior rectus(IR) and lateral rectus(LR),but the arrangements among them were not entirely similar.Only the connective tissue around IO in rhesus consisted of dense collagen,scattered elastic fiber,and connected closely with IR,LR Pulley.The connective tissue circling IO in rabbit and rat were crumbly,and was not connected closely with the connective tissue around IR.Conclusion IR and LR Pulley has some mechanics link with IO in rhesus,and can play roles in covergence in rhesus.
SUN Chun-hua
ZHAO Kan-xing
LIN Jin-yong
作者单位：
300020,天津医科大学眼科临床学院 天津市眼科医院天津市眼科研究所 天津市眼科学与视觉科学重点实验室
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