The researchers then put mice injected with ghrelin and control mice through a maze and other intelligence tests.
And male culture-derived mice explored a maze more boldly than did the other mice, the team reports online this week in the Proceedings of the National Academy of Sciences.
As he and his men began the complicated task of restoring power to a wounded financial district, Steve Cilffi of Consolidated Edison seemed to be running into as many barriers as a mouse in a maze.
That is, the controlled micro-mouse solves a maze by keeping tracking where it is, discovering walls as it explores and mapping out the maze instead of having an already prepared map of the maze and just going through it.
And here was the nice touch for those U.S. Special Operations guys, who seem to have learning abilities somewhat lower than those of a hungry mouse in a maze when it comes to hearts-and-minds-style counterinsurgency warfare.
Animal testing, also known as animal experimentation, animal research, and in vivo testing, is the use of non-human animals in experiments (although some research about animals involves only natural behaviors or pure observation, such as a mouse running a maze or field studies of chimp troops).
The otherwise superlative Grand Theft Auto series is particularly afflicted with this mouse-coaxed-through-a-maze problem, and Bleszinski's only complaint about the G.T.A. games, which he admires, is that they can sometimes "feel like work".
Humane traps work by using bait to lure the mouse into a maze-like tunnel.
His explanation of how the magnetized mouse could run a maze led him, eventually, to the emergence of artificial intelligence.
If young mice are put in a maze several days in a row, most will learn where the escape route is and go right to it, said Dr. Eric L. Kandel, a professor at Columbia.
