Evidence that the early postnatal restriction of the cells of origin of the callosal projection is due to the elimination of axonal collaterals rather than to the death of neurons

By using two fluorescent dyes that are retrogradely transported along axons, we have been able to demonstrate that many of the neurons in the parietal region of the rat cerebral cortex that can be labeled from the contralateral hemisphere early in postnatal development, persist well beyond the perio...

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