Am I reading it correctly that the authors say it's possible to build organic cellular tissues that mimic parts of the human brain (developing typical markers i

Am I reading it correctly that the authors say it's possible to build organic cellular tissues that mimic parts of the human brain (developing typical markers in the different regions of the developing human fetal brain) from human fetal cells of the brain or spinal cord? And these organoids show signs of electrical activity? "We thus find that the human developing brain is capable of robustly self-organizing in vitro over multiple passages into a 3D, layered structure."