Credit: UCLA Health
UCLA researchers mapped the genetic on/off switches driving neurogenesis in the brain and
shaping the expansion of human cortex. The image shows schematics of slices of the mouse,
macaque and human brain to scale. The interior of the slices is represented by a mouse brain, in
which neurons are labeled. Strands of chromatin, where the on/o¬ switches reside, are interlaced
across the brains. (Image by Luis De La Torre/UCLA Health)