Johnson E F, Caldwell R W, Berryman H E, Miller A, Chetty K
Acta Anat (Basel). 1984;118(4):238-42. doi: 10.1159/000145851.
A light microscopic investigation of the anulus fibrosus in cervical intervertebral discs of the dog was conducted to ascertain the arrangement and distribution of elastic fibers. Elastic fibers were observed in all lamellae of the anulus fibrosus. However, collagenous fibers were the predominant type of connective tissue fiber, and elastic fibers were randomly dispersed among them. Intralamellar (collagenous and elastic) fibers were vertically and obliquely oriented in both superficial and deep lamellae of the anulus fibrosus. All intralamellar fibers were densely and regularly arranged in superficial lamellae, but they were more loosely organized in deep lamellae. A narrow border of interlamellar, elastic fibers was observed between broader, contiguous lamellae in the superficial zone of the anulus fibrosus. Interlamellar elastic fibers wer vertically and obliquely arranged in superficial lamellae; however, they were radially oriented in deep lamellae. The deepest lamella of the anulus fibrosus consisted of a loose, three-dimensional network of intermeshing collagenous and elastic fibers. These observations suggest that elastic fibers are integral components of the articular and shock absorption mechanisms of the anulus fibrosus, and the cervical intervertebral disc of the dog is a suitable model for experimental investigation of the role of elastic fibers in intervertebral disc herniation.
对犬颈椎间盘纤维环进行了光镜检查，以确定弹性纤维的排列和分布。在纤维环的所有板层中均观察到弹性纤维。然而，胶原纤维是结缔组织纤维的主要类型，弹性纤维随机分散在其中。板层内（胶原和弹性）纤维在纤维环的浅层和深层中呈垂直和倾斜排列。所有板层内纤维在浅层中密集且规则排列，但在深层中排列较松散。在纤维环浅层较宽的相邻板层之间观察到一层狭窄的板层间弹性纤维边界。板层间弹性纤维在浅层中呈垂直和倾斜排列；然而，它们在深层中呈放射状排列。纤维环的最深层由相互交织的胶原纤维和弹性纤维组成的松散三维网络构成。这些观察结果表明，弹性纤维是纤维环关节和减震机制的组成部分，犬的颈椎间盘是研究弹性纤维在椎间盘突出中作用的合适实验模型。
