Three genes found only in humans impact brain size

Jun 04, 2018, 8:19 AM EDT
(Source: Jean-Etienne Minh-Duy Poirrier/flickr)
(Source: Jean-Etienne Minh-Duy Poirrier/flickr)

A newly released study, exploring the relationship between human-specific brain features and genomic evolution, has discovered three new genes that are exclusive to humans and play a key role in influencing brain size and development.

The brain sizes of the humans showed a dramatic increase just after the rise of these genes in hominins somewhere between three and four millions years ago, writes ResearchGate.

These genes are involved in signalling between and within cells, a process they amplify to increase the proliferation of stem cells and delay neural maturation, which results in larger human brains, notes UC Santa Cruz.