To imagine a complete, supplant of human brain capacity to AI could be a remote achievement by all stretches of the imagination. To treat brain cells would require some significant measure of investment in similar studies, that’s common medical and human approbation, of which extant is underwritten by the elaborate monies laid out.
However, assuming that the ratio of data derived from the studies could be subservient to digital AI assumes that the same biological data fails to predict threats, in which case the studies would abandon their mission and humanity would prepare for a future of probable robotic dominance.