Astrocytes (IMAGE) Tufts University, Health Sciences Campus Caption Research from Tufts University in the journal Neuron reports a new signaling pathway that directly connects major brain receptors associated with learning and memory. Astrocytes (fluorescing green cells above) are the key element that links the receptors. Neurons are red. Credit Thomas Papouin 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.