Immune cells in the human brain may be critical to orchestrating the organ's development in the womb because they trigger a dramatic increase in an important type of nerve cell, new research suggests.
Estimates suggest that these key cells, known as inhibitory interneurons, make up some 25% to 50% of the neurons in the adult cortex, the wrinkled tissue that covers the surface of the brain. In fact, the human cortex carries more than double the number of interneurons as the mouse cortex does.
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