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Differences in the vascular network of various sections of the spinal cord of the chick embryo


, : Differences in the vascular network of various sections of the spinal cord of the chick embryo. Bollettino Societa Italiana Biologia Sperimentale 51(18): (1976) 1213-1216

The anatomical and histologic development of the spinal cord of the chick embryo was examined between the 4th-12th day of incubation. Early differences are observed in the central portion of the basal lamina (5th-6th day), while in the lateral motor column (at the lumbosacral level more voluminous than at the thoracic level), a division into subcolumns begins to manifest itself from the 7th day onward. These differences, initially limited to a greater frequency of the major vessels and to a great compactness of the network at the lumbosacral level, become progressively more pronounced with development. In the alar lamina, in both spinal tracts, the vascularization presents no relative quantitative differences. Later the vascular network becomes more compact in the lumbosacral region than in the thoracic, but only after the sensory gray column and the dorsolateral funiculum have achieved a greater volume. By the 12th day the perineural internal and external divisions appear to be well separated, also in relation to the ventral surface of the cord, in both thoracic and lumbosacral region.

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