In previous experiments done on rats, Cost discovered that the rats were actually mentally sharper after giving birth. (bounty.com)
All the monkeys who received injections of these cells showed a 40 to 55 per cent improvement in their movements, matching results from previous experiments with embryonic stem cells. (newscientist.com)
This differs from previous experiments, in which the subjects were required to perform mental activities at specific times and the scans were then compared with brain activity when they were at rest. (newscientist.com)