Saidel W M
Cell Tissue Res. 1979;204(3):463-72. doi: 10.1007/BF00233657.
Retinal bundles, connecting the retina of the octopus to the ipsilateral optic lobe, contain both retinal photoreceptor axons that terminate in the optic lobe and centrifugal axons whose cell bodies lie within the lobe. Staining axonal elements in proximal stubs of individual retinal bundles by cobalt diffusion and subsequent sulphide treatment reveals the topographic relationship between afferent terminals and centrifugal cell bodies. At the outer border of the plexiform layer, stained terminal bags (photoreceptor axon enlargements), an indicator of photoreceptor terminal spread within this layer, overlap stained centrifugal cell bodies located within the inner granule layer. The details of this overlap indicate a dorsoventral representation of each retinal bundle within the optic lobe cortex.
连接章鱼视网膜与同侧视叶的视网膜束,既包含终止于视叶的视网膜光感受器轴突,也包含其细胞体位于视叶内的离心轴突。通过钴扩散和随后的硫化处理对单个视网膜束近端残端中的轴突成分进行染色,可揭示传入终末与离心细胞体之间的拓扑关系。在神经纤维层的外边界,染色的终末囊(光感受器轴突膨大)是光感受器终末在该层内扩散的指标,它与位于内颗粒层内的染色离心细胞体重叠。这种重叠的细节表明视叶皮质内每个视网膜束的背腹表征。