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- W1963670499 abstract "In order to study age-related processes of degeneration and recovery, the left hemitelencephalon was surgically removed in 5 adult cats and 5 neonatal kittens which were compared to 5 intact controls. After long survival, brains were sectioned in the coronal plane and thionine-stained. Drawings of gross and microscopic thalamic structures were made at 4 planes and computer-digitized to provide 7 measures: total thalamic area at planes A 7.5 and A 8.5; counts of neuroglia, small neurons (31 – 100 μm2) and large neurons (101–1000 μm2); area of neuroglia, small neurons and large neurons. All cellular measurements were in the ventrobasal complex at planes A 8.0 and A 10.0. Morphological changes were found bilaterally in all lesioned cats. Ipsilateral to the ablation in adult-lesioned cats, thalamic area, large neuron count and glia cells size were markedly and significantly decreased (P < 0.01), while in neonatal-lesioned cats these changes were present but significantly reduced in magnitude compared to adult-lesioned animals. In addition, adult-lesioned cats showed a marked increase in glial cell numbers (P < 0.01) and a decrease in small neuron size (P < 0.01), while kitten-lesioned animals did not show changes in these measures. In the intact side of the brain, the thalamus of adult-lesioned cats was decreased in size (P < 0.01), and glial cells were decreased in number and size (P < 0.05), while in kitten-lesioned brains there were few changes. In both lesioned groups large neurons showed a significant increase in size (P < 0.01). We conclude that neonatal hemispherectomy v results in markedly less thalamic atrophy, retrograde neuronal degeneration and gliosis than the equivalent lesion in adults. The changes are discussed in the context of the increased neuronanatomical reorganization and functional recovery which we reported in neonatal- vs adult-lesioned animals." @default.
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- W1963670499 date "1986-03-01" @default.
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- W1963670499 title "There is less thalamic degeneration in neonatal-lesioned than in adult-lesioned cats after cerebral hemispherectomy" @default.
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- W1963670499 doi "https://doi.org/10.1016/0006-8993(86)90564-0" @default.
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