Neuron Over-expressing PKMzeta (IMAGE) NIH/National Institute of Mental Health Caption A neuron in a rat brain's cortex over-expresses PKMzeta (blue). Credit Source: Todd Sacktor, M.D., SUNY Downstate Medical Center 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.