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Astroglia zip the 2 halves of the brain together

(Cell Press) Scientists have identified the cellular origins of the corpus callosum, the 200 million nerve fibers that connect the two hemispheres of the brain. A study in Cell Reports shows that during development, astroglia weave themselves between the right and left lobes, and form the bridge for axons to grow across the gap. Without these astroglia, the corpus callosum doesn't form correctly, causing a common condition called callosal agenesis and a range of developmental disorders.
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