(Medical Xpress) — Paul Allen, co-founder of Microsoft, has added an additional $300 million to the $200 million hes already given to the brain research facility in Seattle he started back in 2003, the Allen Institute for Brain Science. This new grant is to go towards a new initiative for the Institute, outlined by Christof Koch, chief scientist at the Institute and Harvard neuroscientist R. Clay Reid, (who will be joining the Institute) in a recent comment brief in the science journal Nature. The new funding will go towards studying the visual cortex in the brain, starting with mice, and eventually moving to humans.