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This monograph is divided into two parts, one dealing with the anatomy of the neuroglia in the infant brain and the other with the study of the brain after trauma sustained at birth. Particular attention is given to the characteristics of the matrix tissue, a portion of the infant brain which requires still further study. Rydberg differentiates unorthodoxly between small and large spongioblasts. He comes to the conclusion further that the microglia is of ectodermal rather than of mesodermal origin as proved by Hortega. Rydberg claims that it is derived from the ependyma mainly, but in part also from the vascular elements or the leptomeninges. He also favors the concept of a glial reticulum in which "the astrocytes appear as widely ramified cells with an extensive plexiform extension of the expansions, and a dense reticulum becomes visible which is connected with the expansions of both the astrocytes and the oligoglia
Cerebral Injury in New-Born Children Consequent on Birth Trauma: with an Inquiry into the Normal and Pathological Anatomy of the Neuroglia. Arch NeurPsych. 1932;28(5):1240–1241. doi:10.1001/archneurpsyc.1932.02240050276027
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