Stanford University researchers have created a human-mouse chimera whose cerebral cortex contains 91.9% human brain tissue. In a study published in the journal Nature, scientists genetically modified mice to develop without much of the cerebral cortex and hippocampus, leaving the animals with about 50% less total brain tissue than normal mice.
They then implanted lab-grown human brain organoids into the empty space. These organoids are three-dimensional clusters of living human brain cells grown from stem cells. The human neurons did not remain isolated only within the mouse brain. They developed organized electrical activity, made connections with the surrounding mouse nervous system, and extended nerve fibers to the animals' spinal cords. Electrical activity in the transplanted brain tissue was related to the facial movements of the mice. The animals underwent behavioral tests, including assessments of movement, coordination and memory. It should be noted that mice containing human brain tissue performed above chance on a working memory test, while mice without a transplant of a large portion of the cerebral cortex did not. Scientists are now growing living human brain tissue inside animals until it makes up almost their entire cerebral cortex. The question is, is it moral? "Molecular robots" - why this technology is more than 40 years old and how it is related to the long preparation for the "corona 2020" research with facts that technologies for turning a person into a controlled robot have existed for a long time new research on "nanobots" in injections - 2026 chat | BOT | Site | | YUT.