Reale E, Luciano L, Spitznas M
J Neurocytol. 1975 Apr;4(2):131-40. doi: 10.1007/BF01098778.
Ridges and grooves composing extensive zonulae occludentes are revealed by the freeze-fracture method on split myelin lamellae in the nerve fibre layer of the retina and in the optic nerve of the rabbit. The junctions are located immediately internal to the outer loop of the myelin sheath and in corresponding areas of deeper myelin layers. They follow a straight or gently undulating course along the axis of the fibres. Only at the paranodal region of nodes of Ranvier do they deviate and assume a transverse course, The strands of these zonulae occludentes probably represent the radial thickenings of the intraperiod line described in thin sections.
通过冷冻断裂法在兔视网膜神经纤维层和视神经的分裂髓鞘板上，可揭示构成广泛紧密连接小带的嵴和沟。这些连接位于髓鞘外环线的紧邻内侧以及更深髓鞘层的相应区域。它们沿着纤维轴呈直线或轻微起伏的走向。仅在郎飞结的结旁区域它们会发生偏离并呈横向走向。这些紧密连接小带的条索可能代表薄切片中所描述的周期间线的径向增厚。
