Mice With Human Cortical Neurons: A New Frontier in Brain Research
TL;DR Summary
Stanford researchers engineered mice missing a cortical region and implanted human cortical neurons, which proliferated to millions and connected with the mouse brain, creating a partly human brain in the mice. The model could help study human brain development and neurocognitive diseases, including frontotemporal dementia linked to von Economo neurons, but it raises ethical questions about consciousness and animal rights. The human neurons remained immature, the study was halted at six months to avoid potential consciousness markers, and oxygen deprivation at birth produced brain damage in the human-neuron mice, unlike typical mice.
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