The research also reports that not only does the human brain tissue survive, but it incorporates itself into the rat brain.
The research team's aim is to develop"in vivo" models for studying the human brain and its diseases.
But growing human brain organoids in another species is a step closer to seeing inside the human mind, the researchers hope. Particularly when it comes to testing new drugs for brain disease."Just imagine with this model, you have a non-invasive way of testing the drug on human cells"in vivo", says Professor Pasca.
And given the limited life span of rats, human brain tissue, which takes years to reach maturity, can only develop so much.Most experts seem to think given the small size of a rat brain and the even smaller size of the transplanted human tissue, the rats will not become even partially human - and the amount of human brain circuitry is too small to have its own consciousness.
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