this is really, really and really something!

IMHO: this is oldwine in a new bottle.
The article says that "stimulating environment with toys, treadmills and other mice" can improve learning ability in mice with severe brain damage. This is old news, this is common sense.
Then the article says that after being administered with a certain drug, the sick mouses get better at learning things in a way which is very "similar to improvements made by environmental stimulation."
So happy mice (either physically or psychically stimulated) get better learning things. Don't worry be happy and smoke a cigar.