Neurons (IMAGE) UT Southwestern Medical Center Caption Hippocampal neurons create spatial and temporal "maps" of our world. Brain waves called "theta rhythms" help organize the activity of these neurons. A study by Bradley Lega, M.D., and colleagues determined how a group of neurons known as time cells allow the brain to correctly mark the order of events and assist in memory. Credit Illustration by Melissa Logies Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.