Over-expressing the NR2B gene lets brain cells communicate just a fraction of a second longer and makes a smarter rat, report researchers from the Medical College of Georgia and East China Normal University.

The finding further validates NR2B as a drug target for improving memory in healthy individuals as those with Alzheimer’s or mild dementia, the scientists say.

NR2B is a subunit of NMBA receptors, which are like small pores on brain cells that let in electrically-charged ions that increase the activity and communication of neurons.